Statutory Rules
1979 No. 65
REGULATIONS UNDER THE WEIGHTS AND MEASURES (NATIONAL STANDARDS) ACT 1960*
I, THE GOVERNOR-GENERAL of the Commonwealth of Australia, acting with the advice of the Federal Executive Council, hereby make the following Regulations under the Weights and Measures (National Standards) Act 1960.
Dated this twenty-first day of April, 1979.
ZELMAN COWEN
Governor-General
By His Excellency’s Command,
Minister of State for Science and the Environment
AMENDMENTS OF THE WEIGHTS AND MEASURES (NATIONAL STANDARDS) REGULATIONS†
Interpretation
1. Regulation 3 of the Weights and Measures (National Standards) Regulations is amended by omitting sub-regulation (3) and substituting the following sub-regulation:
“ (3) For the purposes of these Regulations, a symbol specified in Column 4 of a Schedule that is formed by the algebraic combination of symbols of other units may also be expressed using appropriate negative exponents.”.
2. Part II of the Weights and Measures (National Standards) Regulations is repealed and the following Part is substituted:
“ PART II—UNITS OF MEASUREMENT
“ Division 1—Length
Units of measurement of length
“ 4. (1) The units of measurement of length are the units specified in Column 2 of Schedule 1.
* Notified in the Commonwealth of Australia Gazette on 27 April 1979
† Statutory Rules 1961 No. 142 as amended by Statutory Rules 1963 No. 126; No. 1964 No. 146; 1965 No. 13; 1968 No. 150; 1970 No. 40; 1972 Nos. 62, 133 and 160; 1973 Nos. 63 and 253; and 1977 No. 150.
10479/78 Cat. No. —Recommended retail price 25c. 14/9.2.1979
“ (2) A unit of measurement specified, in an item in Schedule 1 is related to the metre as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 1 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The metre
“ 5. The metre is the length equal to 1 650 763.73 wave-lengths in vacuum of the radiation corresponding to the transition between the levels 2p_{10} and 5d_{5} of the krypton-86 atom.
“ Division 2—Area
Units of measurement of area
“ 6. (1) The units of measurement of area are the units specified in Column 2 of Schedule 2.
“ (2) A unit of measurement specified in an item in Schedule 2 is related to the square metre as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 2 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The square metre
“ 7. The square metre is the area of a square each side of which is 1 metre in length.
“ Division 3—Mass
Units of measurement of mass
“ 8. (1) The units of measurement of mass are the units specified in Column 2 of Schedule 3.
“ (2) A unit of measurement specified in an item in Schedule 3 is related to the kilogram as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 3 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The kilogram
“ 9. The kilogram is the mass of the cylinder that—
(a) is deposited in the International Bureau of Weights and Measures; and
(b) was declared by the First General Conference on Weights and Measures held in Paris in the year 1889 to be the International Prototype Kilogram.
“ Division 4—Volume
Units of measurement of volume
“ 10. (1) The units of measurement of volume are the units specified in Column 2 of Schedule 4.
“ (2) A unit of measurement specified in an item in Schedule 4 is related to the cubic metre as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 4 may be referred to by the symbol in Column 4 of that Schedule in that item.
The cubic metre
“ 11. The cubic metre is the volume of a cube each side of which is 1 metre in length.
“ Division 5—Density
Units of measurement of density
“ 12. (1) The units of measurement of density are the units specified in Column 2 of Schedule 5.
“ (2) A unit of measurement specified in an item in Schedule 5 is related to the kilogram per cubic metre as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 5 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The kilogram per cubic metre
“ 13. The kilogram per cubic metre is the density of a uniform substance a mass of 1 kilogram of which occupies a volume of 1 cubic metre.
“ Division 6—Angle
Units of measurement of plane angle
“ 14. (1) The units of measurement of plane angle are the units specified in Column 2 of Schedule 6.
“ (2) A unit of measurement specified in an item in Schedule 6 is related to the radian as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 6 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The radian
“ 15. The radian is the plane angle between 2 radii of a circle that cut off on the circumference an arc equal in length to the radius.
The degree
“ 16. The degree is the plane angle between 2 radii of a circle that cut off on the circumference an arc that is 1/360 of the circumference.
Conversion factor
“ 17. (1) For all legal purposes 1 degree shall be deemed to be equal to radians, where π is the ratio of the circumference of a circle to the diameter of that circle.
“ (2) For the purposes of this regulation the ratio of the circumference of a circle to the diameter of that circle shall be deemed to be equal to 3.141 592 654.
Unit of measurement of solid angle
“ 18. (1) The unit of measurement of solid angle is the steradian.
“ (2) The steradian may be referred to by the symbol ‘ sr ’.
The steradian
“ 19. The steradian is the solid angle that has its vertex in the centre of a sphere and cuts off an area of the surface of the sphere equal to that of a square with sides of length equal to the radius of the spheres
“ Division 7—Time interval
Units of measurement of time interval
“ 20. (1) The units of measurement of time interval are the units specified in Column 2 of Schedule 7.
“ (2) A unit of measurement specified in an item in Schedule 7 is related to the second as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 7 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The second
“ 21. The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium-133 atom.
“ Division 8—Frequency
Units of measurement of frequency
“ 22. (1) The units of measurement of frequency are the units specified in Column 2 of Schedule 8.
“ (2) A unit of measurement specified in an item in Schedule 8 is related to the hertz as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 8 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The hertz
“ 23. The hertz is the frequency of a regularly recurrent phenomenon that repeats itself once each second.
“ Division 9—Velocity and speed
Units of measurement of velocity and speed
“ 24. (1) The units of measurement of velocity and speed are the units specified in Column 2 of Schedule 9.
“ (2) A unit of measurement specified in an item in Schedule 9 is related to the metre per second as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 9 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The metre per second
“ 25. The metre per second is the mean velocity or the mean speed of a point that moves its position rectilinearly a distance of 1 metre in 1 second.
“ Division 10—Acceleration
Units of measurement of acceleration
“ 26. (1) The units of measurement of acceleration are the units specified in Column 2 of Schedule 10.
“ (2) A unit of measurement specified in an item in Schedule 10 is related to the metre per second squared as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 10 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The metre per second squared
“ 27. The metre per second squared is the mean acceleration of a point that changes its velocity by 1 metre per second in 1 second.
“ Division 11—Force
Units of measurement of force
“ 28. (1) The units of measurement of force are the units specified in Column 2 of Schedule 11.
“ (2) A unit of measurement specified in an item in Schedule 11 is related to the newton as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 11 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The newton
“ 29. The newton is the force which when applied to a body having a mass of 1 kilogram causes an acceleration of 1 metre per second squared in the direction of application of the force.
“ Division 12—Work and energy
Units of measurement of work and energy
“ 30. (1) The units of measurement of work and energy are the units specified in Column 2 of Schedule 12.
“ (2) A unit of measurement specified in an item in Schedule 12 is related to the joule as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 12 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The joule
“ 31. The joule is the work done or the energy expended when a force of 1 newton moves the point of application a distance of 1 metre in the direction of that force.
“ Division 13—Power
Units of measurement of power
“ 32. (1) The units of measurement of power are the units specified in Column 2 of Schedule 13.
“ (2) A unit of measurement specified in an item in Schedule 13 is related to the watt as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 13 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The watt
“ 33. The watt is the power used when work is done or energy is expended at the rate of 1 joule per second.
“ Division 14—Pressure
Units of measurement of pressure
“ 34. (1) The units of measurement of pressure are the units specified in Column 2 of Schedule 14.
“ (2) A unit of measurement specified in an item in Schedule 14 is related to the pascal as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 14 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The pascal
“ 35. The pascal is the pressure resulting from a force of 1 newton applied uniformly over an area of 1 square metre.
“ Division 15—Viscosity and kinematic viscosity
Units of measurement of viscosity and kinematic viscosity
“ 36. (1) The units of measurement of viscosity and kinematic viscosity are the units specified in Column 2 of Schedule 15.
“ (2) A unit of measurement specified in an item in Schedule 15 is related to the pascal second or the square metre per second as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 15 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The pascal second
“ 37. The pascal second is the viscosity of a fluid for which there is a tangential force of 1 newton on 1 square metre of either of 2 infinite parallel planes 1 metre apart when—
(a) the space between those planes is filled with the fluid;
(b) one of the planes moves with a velocity of 1 metre per second in its own plane relative to the other; and
(c) the movement of the fluid is laminar.
The square metre per second
“ 38. The square metre per second is the kinematic viscosity of a fluid having a viscosity of 1 pascal second and a density of 1 kilogram per cubic metre.
“ Division 16—Electric current
Units of measurement of electric current
“ 39. (1) The units of measurement of electric current are the units specified in Column 2 of Schedule 16.
“ (2) A unit of measurement specified in an item in Schedule 16 is related to the ampere as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 16 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The ampere
“ 40. The ampere is the unvarying electric current that, when flowing in each of 2 parallel straight conductors of infinite length of negligible cross-section and separated by a distance of 1 metre from each other in free space, produces between those conductors a force equal to 0.2 × 10^{-6} newtons per metre length of conductor.
“ Division 17—Electric charge
Units of measurement of electric charge
“ 41. (1) The units of measurement of electric charge are the units specified in Column 2 of Schedule 17.
“ (2) A unit of measurement specified in an item in Schedule 17 is related to the coulomb as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 17 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The coulomb
“ 42. The coulomb is the quantity of electric charge that is transferred each second by an electric current of 1 ampere.
“ Division 18—Potential difference and electromotive force
Units of measurement of potential difference and electromotive force
“ 43. (1) The units of measurement of potential difference and electromotive force are the units specified in Column 2 of Schedule 18.
“ (2) A unit of measurement specified in an item in Schedule 18 is related to the volt as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 18 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The volt
“ 44. The volt is the potential difference that exists between 2 points on a conductor carrying an unvarying electric current of 1 ampere when the power dissipated between those points is equal to 1 watt.
“ Division 19—Electrical resistance
Units of measurement of electrical resistance
“ 45. (1) The units of measurement of electrical resistance are the units specified in Column 2 of Schedule 19.
“ (2) A unit of measurement specified in an item in Schedule 19 is related to the ohm as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 19 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The ohm
“ 46. The ohm is the electrical resistance between 2 points on a conductor that does not contain any source of electromotive force when a constant potential difference of 1 volt maintained between those points results in a current of 1 ampere in the conductor.
“ Division 20—Electrical conductance
Units of measurement of electrical conductance
“ 47. (1) The units of measurement of electrical conductance are the units specified in Column 2 of Schedule 20.
“ (2) A unit of measurement specified in an item in Schedule 20 is related to the siemens as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 20 may be referred to by the symbol specified in. Column 4 of that Schedule in that item.
The siemens
“ 48. The siemens is the electrical conductance of a conductor that has an electrical resistance of 1 ohm.
“ Division 21—Electrical capacitance
Units of measurement of electrical capacitance
“ 49. (1) The units of measurement of electrical capacitance are the units specified in Column 2 of Schedule 21.
“ (2) A unit of measurement specified in an item in Schedule 21 is related to the farad as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 21 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The farad
“ 50. The farad is the electrical capacitance that exists between 2 conductors when the transfer of an electric charge of 1 coulomb from one to the other changes the potential difference between them by 1 volt.
“ Division 22—Electrical inductance
Units of measurement of electrical inductance
“ 51. (1) The units of measurement of electrical inductance are the units specified in Column 2 of Schedule 22.
“ (2) A unit of measurement specified in an item in Schedule 22 is related to the henry as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 22 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The henry
“ 52. The henry is the electrical inductance of a closed circuit in which an electromotive force of 1 volt is produced when the electric current that traverses the circuit varies uniformly at the rate of 1 ampere per second.
“ Division 23—Temperature
Units of measurement of temperature
“ 53. (1) The units of measurement of temperature are the units specified in Column 2 of Schedule 23.
“ (2) A unit of measurement specified in ah item in Schedule 23 is related to the kelvin as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 23 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The kelvin and the degree Celsius
“ 54. (1) The kelvin is 1/273.16 of the thermodynamic temperature of the triple point of water.
“ (2) The degree Celsius is the unit of measurement of Celsius temperature and is equal in magnitude to the kelvin.
“ (3) The numerical value in degrees Celsius of a thermodynamic temperature is related to the numerical value of that temperature in kelvins in accordance with the equation
, where—
t is the numerical value of that temperature in degrees Celsius;
and
T is the numerical value of that temperature in kelvins.
“ Division 24—Luminous intensity
Units of measurement of luminous intensity
“ 55. (1) The units of measurement of luminous intensity are the units specified in Column 2 of Schedule 24.
“ (2) A unit of measurement specified in an item in Schedule 24 is related to the candela as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in and item in Schedule 24 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The candela
“ 56. The candela is the luminous intensity in the perpendicular direction of a surface of 1/600 000 square metre of a full radiator at the temperature of solidification of platinum under a pressure of 101 325 pascals.
“ Division 25—Luminous flux
Units of measurement of luminous flux
“ 57. (1) The units of measurement of luminous flux are the units specified in Column 2 of Schedule 25.
“ (2) A unit of measurement specified in an item in Schedule 25 is related to the lumen as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 25 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The lumen
“ 58. The lumen is the luminous flux emitted into a solid angle of 1 steradian by an isotropic point source having a luminous intensity of 1 candela.
“ Division 26—Illuminance
Units of measurement of illuminance
“ 59. (1) The units of measurement of illuminance are the unit specified in Column 2 of Schedule 26.
“ (2) A unit of measurement specified in an item in Schedule 26 is related to the lux as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 26 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The lux
“ 60. The lux is the illuminance produced at the surface of a sphere having a radius of 1 metre by a point source that—
(a) is situated at its centre; and
(b) has a luminous intensity of 1 candela in all directions.
“ Division 27—Luminance
Units of measurement of luminance
“ 61. (1) The units of measurement of luminance are the units specified in Column 2 of Schedule 27.
“ (2) A unit of measurement specified in an item in Schedule 27 is related to the candela per square metre as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 27 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The candela per square metre
“ 62. The candela per square metre is the luminance of a surface that has a uniform luminous intensity of 1 candela per square metre of projected area.
“ Division 28—Activity (radionuclides)
Units of measurement of activity
“ 63. (1) The units of measurement of activity of a radionuclide are the units specified in Column 2 of Schedule 28.
“ (2) A unit of measurement specified in an item in Schedule 28 is related to the becquerel as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 28 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The becquerel
“ 64. The becquerel is the activity of a radionuclide that is undergoing 1 transformation per second.
“ Division 29—Exposure (ionizing radiation)
Units of measurement of exposure
“ 65. (1) The units of measurement of exposure to ionizing radiation are the units specified in Column 2 of Schedule 29.
“ (2) A unit of measurement specified in an item in Schedule 29 is related to the coulomb per kilogram as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 29 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The coulomb per kilogram
“ 66. The coulomb per kilogram is the exposure to ionizing radiation in respect of which the sum of the electric charges of all the ions of the same sign produced in air equals 1 coulomb per kilogram of the mass of a volume of air when all the negatrons and positrons liberated by the radiation in that volume of air are completely stopped in air.
“ Division 30—Absorbed dose, absorbed dose index, kerma and specific energy imparted (ionizing radiation)
Units of measurement of absorbed dose, absorbed dose index, kerma and specific energy imparted
“ 67. (1) The units of measurement of absorbed dose, absorbed dose index, kerma and specific energy imparted are the units specified in Column 2 of Schedule 30.
“ (2) A unit of measurement specified in an item in Schedule 30 is related to the gray as specified in Column 3 of that Schedule in that item.
“ (3) A unit of measurement specified in an item in Schedule 30 may be referred to by the symbol specified in Column 4 of that Schedule in that item.
The gray
“ 68. The gray is the absorbed dose, absorbed dose index, kerma or specific energy imparted when 1 joule is imparted to 1 kilogram of irradiated matter.”.
Permissible variations in certain subsidiary standards of measurement —Schedule 31
3. Regulation 82 of the Weights and Measures (National Standards) Regulations is amended by omitting from sub-regulation (1) “ the Twenty-fourth Schedule ” and substituting “ Schedule 31 ”.
Permissible variations in certain subsidiary standards of measurement —Schedule 32
4. Regulation 83 of the Weights and Measures (National Standards) Regulations is amended—
(a) by omitting from sub-regulation (1) “ the Twenty-fifth Schedule ” and substituting “ Schedule 32 ”; and
(b) by omitting from sub-regulation (2) “ the Twenty-fifth Schedule ” and substituting “ Schedule 32 ”.
First to Twenty-third Schedules (inclusive)
5. The First to the Twenty-third Schedules (inclusive) to the Weights and Measures (National Standards) Regulations are repealed and the following Schedules substituted:
SCHEDULE 1 Regulation 4
UNITS OF MEASUREMENT OF LENGTH
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Length in metres | Symbol |
1 | nautical mile ..................................... | 1852 | n mile |
2 | kilometre ........................................... | 10^{3} | km |
3 | hectometre ........................................ | 10^{2} | hm |
4 | dekametre ......................................... | 10 | dam |
5 | metre ................................................. | 1 | m |
6 | decimetre .......................................... | 10^{-1} | dm |
7 | centimetre ......................................... | 10^{-2} | cm |
8 | millimetre .......................................... | 10^{-3} | nun |
9 | micrometre or micron ....................... | 10^{-3} | µm |
10 | nanometre ......................................... | 10^{-3} | nm |
11 | mile ................................................... | 1609.344 | .. |
12 | chain ................................................. | 22 (0.9144) | ch |
13 | yard .................................................. | 0.9144 | yd |
14 | foot ................................................... | ⅓ (0.9144) | ft or ′ |
15 | link ................................................... | 22/100 (0.9144) | lk |
16 | inch ................................................... | 1/36 (0.9144) | in or ″ |
SCHEDULE 2 Regulation 6
UNITS OF MEASUREMENT OF AREA.
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Area in square metres | Symbol |
1 | square kilometre ............................... | 10^{8} | km^{2} |
2 | hectare .............................................. | 10^{4} | Ha |
3 | square metre ..................................... | 1 | m^{2} |
4 | square decimetre ............................... | 10^{-2} | dm^{2} |
5 | square centimetre .............................. | 10^{-4} | cm^{2} |
6 | square millimetre .............................. | 10^{-6} | mm^{2} |
7 | square yard ....................................... | (0.9144)^{2} | sq yd or yd^{2} |
8 | square foot ........................................ | 1/9 (0.9144)^{2} | sq ft or ft^{2} |
9 | square inch ....................................... | 1/1396 (0.9144)^{2} | sq in or in^{2} |
10 | acre ................................................... | 4 840 (0.9144)^{2} | ac |
11 | rood .................................................. | 1 210 (0.9144)^{2} | rd |
12 | perch ................................................. | 30.25 (0.9144)^{2} | P |
SCHEDULE 3 Regulation 8
UNITS OF MEASUREMENT OF MASS
Column 1 | Column 2 | Column 3 | Column 4 |
item | Name of unit | Mass in kilograms | Symbol |
1 | megatonne ............................................. | 10^{9} | Mt |
2 | kilotonne ................................................ | 10^{6} | kt |
3 | tonne ...................................................... | 10^{3} | t |
4 | megagram .............................................. | 10^{3} | Mg |
5 | kilogram ................................................. | 1 | kg |
6 | hectogram .............................................. | 10^{-1} | .. |
7 | dekagram ............................................... | 10^{-2} | .. |
8 | gram ....................................................... | 10^{-3} | g |
9 | decigram ................................................ | 10^{-4} | dg |
10 | centigram ............................................... | 10^{-5} | cg |
11 | milligram ................................................ | 10^{-6} | mg |
12 | microgram .............................................. | 10^{-9} | µg |
13 | ton ......................................................... | 2 240 (0.453 592 37) | .. |
14 | short ton ................................................. | 2 000 (0.453 592 37) | sh tn |
15 | hundredweight ....................................... | 112 (0.453 592 37) | cwt |
16 | quarter ................................................... | 28 (0.453 592 37) | qr |
17 | stone ...................................................... | 14 (0.453 592 37) | .. |
18 | pound .................................................... | 1 (0.453 592 37) | lb |
19 | ounce...................................................... | 1/16 (0.453 592 37) | oz |
20 | dram ...................................................... | 1/256 (0.453 592 37) | dr |
21 | grain ....................................................... | 1/7000 (0.453 592 37) | gr |
22 | metric carat ............................................ | 0.2 × 10^{-3} | CM |
23 | slug ........................................................ | 32.174 (0.453 592 37) | .. |
24 | troy ounce .............................................. | ^{480}/7000 (0.45.1 592 37) | oz tr |
25 | pennyweight .......................................... | ^{24}/7000 (0.453 593 37) | dwt |
SCHEDULE 4 Regulation 10
UNITS OF MEASUREMENT OF VOLUME
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Volume in cubic metres | Symbol |
1 | cubic kilometre ...................................... | 10^{9} | km^{3} |
2 | teralitre ................................................... | 10^{9} | TL or Tl |
3 | gigalitre .................................................. | 10^{6} | GL or Gl |
4 | megalitre ................................................ | 10^{3} | ML or Ml |
5 | cubic metre ............................................ | 1 | m^{3} |
6 | kilolitre .................................................. | 1 | kL or kl |
7 | hectolitre ................................................ | 10^{-1} | hL or hl |
8 | dekalitre ................................................. | 10^{-2} | daL or dal |
9 | cubic decimetre ...................................... | 10^{-3} | dm^{3} |
10 | litre ........................................................ | 10^{-3} | L or l |
11 | decilitre .................................................. | 10^{-4} | dL or dl |
12 | centilitre ................................................. | 10^{-5} | cL or cl |
13 | cubic centimetre ..................................... | 10^{-6} | cm^{3} |
14 | millilitre ................................................. | 10^{-6} | mL or ml |
15 | microlitre ............................................... | 10^{-9} | µL or µl |
16 | cubic millimetre ..................................... | 10^{-9} | mm^{3} |
17 | cubic yard .............................................. | (0.9144)^{3} | cu yd or yd^{3} |
18 | cubic foot .............................................. | 1/27 (0.9144)^{3} | cu ft or ft^{3} |
19 | cubic inch .............................................. | 1/46666 (0.9144)^{3} | cu in or in^{3} |
20 | gallon ..................................................... | 1 × 4.546 09 × 10^{-3} | gal |
21 | quart ...................................................... | ¼ × 4.546 09 × 10^{-3} | qt |
22 | pint ........................................................ | ⅛ × 4.546 09 × 10^{-3} | pt |
23 | gill .......................................................... | 1/33 × 4.546 09 × 10^{-3} | .. |
24 | fluid ounce ............................................ | 1/100 × 4.546 09 × 10^{-3} | fl oz |
25 | fluid drachm .......................................... | 1/1280 × 4.546 09 × 10^{-3} | fl dr |
26 | minim .................................................... | 1/76800 × 4.5416 09 × 10^{-3} | min |
SCHEDULE 5 Regulation 12
UNITS OF MEASUREMENT OF DENSITY
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Density in kilograms per cubic metre | Symbol |
1 | gram per cubic centimetre............... | 10^{3} | g/cm^{3} |
2 | tonne per cubic metre ..................... | 10^{3} | t/m^{3} |
3 | kilogram per cubic metre ................ | 1 | kg/m^{3} |
4 | kilogram per hectolitre .................... | 10 | kg/hL or kg/hl |
5 | kilogram per litre ............................ | 10^{3} | kg/L or kg/l |
6 | gram per millilitre ........................... | 10^{3} | g/mL or g/ml |
SCHEDULE 6 Regulation 14
UNITS OF MEASUREMENT OF PLANE ANGLE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Angle in radians | Symbol |
1 | radian ..................................................... | 1 | rad |
2 | milliradian .............................................. | 10^{-3} | mrad |
3 | microradian ............................................ | 10^{-6} | µrad |
4 | degree .................................................... | π/180 | ° |
5 | minute .................................................... | 1/60 × π/180 | ′ |
6 | second ................................................... | 1/3600 × π/180 | ″ |
SCHEDULE 7 Regulation 20
UNITS OF MEASUREMENT OF TIME INTERVAL
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Time interval in seconds | Symbol |
1 | day ...................................................... | 86 400 | d |
2 | hour .................................................... | 3 600 | h |
3 | minute ................................................. | 60 | min |
4 | second ................................................. | 1 | s |
5 | millisecond .......................................... | 10^{-3} | ms |
6 | microsecond ........................................ | 10^{-6} | µs |
7 | nanosecond ......................................... | 10^{-8} | ns |
SCHEDULE 8 Regulation 22
UNITS OF MEASUREMENT OF FREQUENCY
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Frequency in hertz | Symbol |
1 | megahertz ............................................ | 10^{6} | MHz |
2 | kilohertz .............................................. | 10^{3} | kHz |
3 | hertz .................................................... | 1 | Hz |
4 | revolution per minute .......................... | 1/60 | r/min |
5 | revolution per second .......................... | 1 | r/s |
SCHEDULE 9 Regulation 24
UNITS OF MEASUREMENT OF VELOCITY AND SPEED
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Velocity or speed in metres per second | Symbol |
1 | metre per second ................................. | 1 | m/s |
2 | knot ..................................................... | 403/900 | kn |
3 | kilometre per hour ............................... | 6/18 | km/h |
4 | centimetre per second ......................... | 10^{-2} | cm/s |
5 | millimetre per second .......................... | 10^{-3} | mm/s |
6 | mile per hour ....................................... | | mile/h or mph |
7 | foot per minute ................................... | | ft/min |
SCHEDULE 10 Regulation 26
UNITS OF MEASUREMENT OF ACCELERATION
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Acceleration in metres per second squared | Symbol |
1 | metre per second squared .................... | 1 | m/s^{2} |
2 | centimetre per second squared ............ | 10^{-2} | cm/s^{2} |
3 | millimetre per second squared ............. | 10^{-3} | mm/s^{3} |
4 | micrometre per second squared ........... | 10^{-6} | µm/s^{2} |
SCHEDULE 11 Regulation 28
UNITS OF MEASUREMENT OF FORCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Force in newtons | Symbol |
1 | meganewton ........................................ | 10^{6} | MN |
2 | kilonewton .......................................... | 10^{3} | kN |
3 | newton ................................................ | 1 | N |
4 | millinewton ......................................... | 10^{-3} | mN |
SCHEDULE 12 Regulation 30
UNITS OF MEASUREMENT OF WORK AND ENERGY
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Work or energy joules | Symbol |
1 | exajoule .............................................. | 10^{16} | EJ |
2 | petajoule ............................................. | 10^{15} | PJ |
3 | terajoule .............................................. | 10^{12} | TJ |
4 | gigajoule .............................................. | 10^{9} | GJ |
5 | megajoule ............................................ | 10^{6} | MJ |
6 | kilojoule .............................................. | 10^{3} | kJ |
7 | joule .................................................... | 1 | J |
8 | gigawatt hour ....................................... | 3.6 × 10^{12} | GW.h |
9 | megawatt hour ..................................... | 3.6 × 10^{9} | MW.h |
10 | kilowatt hour ....................................... | 3.6 × 10^{6} | kW.h |
11 | watt hour ............................................. | 3.6 × 10^{3} | W.h |
12 | kilocalorie ........................................... | 4.1868 × 10^{3} | kcal |
13 | calorie ................................................. | 4.1868 | cal |
14 | British thermal Unit ............................. | 1055.096 | Btu |
15 | gigaelectronvolt ................................... | 1.602 1892 × 10^{-10} | GeV |
16 | megaelectronvolt ................................. | 1.602 1892 × 10^{-13} | MeV |
17 | kiloelectronvolt ................................... | 1.602 1892 × 10^{-16} | keV |
18 | electronvolt ......................................... | 1.602 1892 × 10^{-19} | eV |
SCHEDULE 13 Regulation 32
UNITS OF MEASUREMENT OF POWER
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Power in watts | Symbol |
1 | gigawatt ............................................... | 10^{9} | GW |
2 | megawatt ............................................. | 10^{6} | MW |
3 | kilowatt ............................................... | 10^{3} | kw |
4 | watt ..................................................... | 1 | W |
5 | milliwatt .............................................. | 10^{-3} | mW |
6 | microwatt ............................................ | 10/6 | µW |
7 | horsepower ......................................... | 745.7 | hp |
SCHEDULE 14 Regulation 34
UNITS OF MEASUREMENT OF PRESSURE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Pressure in pascal | Symbol |
1 | gigapascal ............................................ | 10^{9} | G Pa |
2 | megapascal .......................................... | 10^{6} | M Pa |
3 | kilopascal ............................................ | 10^{3} | k Pa |
4 | pascal .................................................. | 1 | Pa |
5 | millibar ................................................ | 100 | mb or mbar |
6 | millimetre of mercury ......................... | 133.322 19 | mm Hg |
SCHEDULE 15 Regulation 36
UNITS OF MEASUREMENT OF VISCOSITY AND KINEMATIC VISCOSITY
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Viscosity in pascal seconds or kinematic viscosity in square metres per second | Symbol |
| viscosity .............................................. | pascal seconds | |
1 | pascal second ...................................... | 1 | Pa.s |
2 | millipascal second ............................... | 10^{-3} | mPa.s |
3 | poise ................................................... | 10^{-3} | P |
4 | centipoise ............................................ | 10^{-3} | cP |
| kinematic viscosity .............................. | square metres per second | |
5 | square metre per second ...................... | 1 | m^{2}/s |
6 | square millimetre per second ............... | 10^{-6} | mm^{2}/s |
7 | stokes .................................................. | 10^{-4} | St |
8 | centistokes .......................................... | 10^{-6} | cSt |
SCHEDULE 16 Regulation 39
UNITS OF MEASUREMENT OF ELECTRIC CURRENT
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Electric current in amperes | Symbol |
1 | kiloampere .......................................... | 10^{3} | kA |
2 | ampere ................................................ | 1 | A |
3 | milliampere ......................................... | 10^{-3} | mA |
4 | microampere ....................................... | 10^{-6} | µA |
SCHEDULE 17 Regulation 41
UNITS OF MEASUREMENT OF ELECTRICAL CHARGE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Electric charge in coulombs | Symbol |
1 | coulomb .............................................. | 1 | C |
2 | ampere hour ........................................ | 3600 | A.h |
SCHEDULE 18 Regulation 43
UNITS OF MEASUREMENT OF POTENTIAL DIFFERENCE AND ELECTROMOTIVE FORCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Potential difference or electromotive force in volts | Symbol |
1 | gigavolt ............................................... | 10^{9} | GV |
2 | megavolt ............................................. | 10^{6} | MV |
3 | kilovolt ................................................ | 10^{3} | kV |
4 | volt ...................................................... | 1 | V |
5 | millivolt ............................................... | 10^{-3} | mV |
6 | microvolt ............................................. | 10^{-6} | µV |
SCHEDULE 19 Regulation 45
UNITS OF MEASUREMENT OF ELECTRICAL RESISTANCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Electrical resistance in ohms | Symbol |
1 | gigohm ................................................ | 10^{9} | GΩ |
2 | megohm .............................................. | 10^{6} | MΩ |
3 | kilohm ................................................. | 10^{3} | kΩ |
4 | ohm ..................................................... | 1 | Ω |
5 | microhm .............................................. | 10^{-6} | µΩ |
SCHEDULE 20 Regulation 47
UNITS OF MEASUREMENT OF ELECTRICAL CONDUCTANCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Electrical conductance in siemens | Symbol |
1 | siemens ............................................... | 1 | S |
2 | millisiemens ........................................ | 10^{-3} | mS |
3 | microsiemens ...................................... | 10^{-6} | µS |
SCHEDULE 21 Regulation 49
UNITS OF MEASUREMENT OF ELECTRICAL CAPACITANCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Electrical capacitance in farads | Symbol |
1 | farad ................................................... | 1 | F |
2 | microfarad .......................................... | 10^{-6} | µF |
3 | nanofarad ............................................ | 10^{-9} | nF |
4 | picofarad ............................................. | 10^{-12} | pF |
SCHEDULE 22 Regulation 51
UNITS OF MEASUREMENT OF ELECTRICAL INDUCTANCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Electrical inductance in henrys | Symbol |
1 | henry ................................................... | 1 | H |
2 | millihenry ............................................ | 10^{-3} | mH |
3 | microhenry .......................................... | 10^{-6} | µH |
SCHEDULE 23 Regulation 53
UNITS OF MEASUREMENT OF TEMPERATURE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Temperature interval in kelvins | Symbol |
1 | kelvin .................................................. | 1 | K |
2 | millikelvin ........................................... | 0.001 | mK |
3 | degree Celsius ..................................... | 1 | °C |
SCHEDULE 24 Regulation 55
UNITS OF MEASUREMENT OF LUMINOUS INTENSITY.
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Luminous intensity in candelas | Symbol |
1 | megacandela ....................................... | 10^{6} | Mcd |
2 | kilocandela .......................................... | 10^{3} | kcd |
3 | candela ................................................ | 1 | cd |
4 | millicandela ......................................... | 10^{-3} | mcd |
5 | microcandela ....................................... | 10^{-6} | µcd |
SCHEDULE 25 Regulation 57
UNITS OF MEASUREMENT OF LUMINOUS FLUX
Column 1 | Column 2. | Column 3 | Column 4 |
Item | Name of unit | Luminous flux in lumen | Symbol |
1 | megalumen .......................................... | 10^{6} | Mlm |
2 | kilolumen ............................................ | 10^{3} | klm |
3 | lumen .................................................. | 1 | lm |
4 | millilumen ........................................... | 10^{-3} | mlm |
5 | microlumen ......................................... | 10^{-6} | µlm |
SCHEDULE 26 Regulation 59
UNITS OF MEASUREMENT OF ILLUMINANCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Illuminance in lux | Symbol |
1 | megalux .............................................. | 10^{6} | Mlx |
2 | kilolux ................................................. | 10^{3} | klx |
3 | lux ....................................................... | 1 | lx |
4 | millilux ................................................ | 10^{-3} | mlx |
5 | microlux .............................................. | 10^{-6} | µlx |
SCHEDULE 27 Regulation 61
UNITS OF MEASUREMENT OF LUMINANCE
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Luminance in candelas per square metre | Symbol |
1 | megacandela per square metre ............ | 10^{6} | Mcd/m^{2} |
2 | kilocandela per square metre ............... | 10^{3} | kcd/m^{2} |
3 | candela per square metre ..................... | 1 | cd/m^{2} |
4 | millicandela per square metro ............. | 10^{-3} | mcd/m^{2} |
5 | microcandela per square metre ............ | 10^{-6} | µcd/m^{2} |
SCHEDULE 28 Regulation 63
UNITS OF MEASUREMENT OF ACTIVITY (RADIONUCLIDES)
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Activity in becquerels | Symbol |
1 | petabecquerel ...................................... | 10^{16} | PBq |
2 | terabecquerel ....................................... | 10^{12} | TBq |
3 | gigabecquerel ...................................... | 10^{9} | GBq |
4 | megabecquerel .................................... | 10^{6} | MBq |
5 | kilobecquerel ...................................... | 10^{3} | kBq |
6 | becquerel ............................................ | 1 | Bq |
7 | millibecquerel ..................................... | 10^{-3} | mBq |
8 | microbecquerel ................................... | 10^{-8} | µBq |
9 | megacurie ............................................ | 3.7 × 10^{18} | MCi |
10 | kilocurie .............................................. | 3.7 × 10^{13} | kCi |
11 | curie .................................................... | 3.7 × 10^{10} | Ci |
12 | millicurie ............................................. | 3.7 × 10^{7} | mCi |
13 | microcurie ........................................... | 3.7 × 10^{8} | µCi |
14 | nanocurie ............................................ | 3.7 × 10 | nCi |
15 | picocurie ............................................. | 3.7 × 10^{-2} | pCi |
16 | femtocurie ........................................... | 3.7 × 10^{-5} | fCi |
SCHEDULE 29 Regulation 65
UNITS OF MEASUREMENT OF EXPOSURE (IONIZING RADIATION)
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Exposure in coulombs per kilogram | Symbol |
1 | kilocoulomb per kilogram ................... | 10^{3} | kC/kg |
2 | coulomb per kilogram ......................... | 1 | C/kg |
3 | millicoulomb per kilogram .................. | 10^{-3} | mC/kg |
4 | microcoulomb per kilogram ................ | 10^{-6} | µC/kg |
5 | nanocoulomb per kilogram ................. | 10^{-9} | nC/kg |
6 | megaroentgen ...................................... | 0.258 × 10^{3} | MR |
7 | kiloroentgen ........................................ | 0.258 | kR |
8 | roentgen .............................................. | 0.258 × 10^{-3} | R |
9 | milliroentgen ....................................... | 0.258 × 10^{-6} | mR |
10 | microroentgen ..................................... | 0.258 × 10^{-9} | µR |
SCHEDULE 30 Regulation 67
UNITS OF MEASUREMENT OF ABSORBED DOSE, ABSORBED DOSE INDEX, KERMA AND SPECIFIC ENERGY IMPARTED (IONIZING RADIATION)
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Absorbed dose, absorbed dose index, kerma or specific energy imparted in grays | Symbol |
1 | megagray ....................................... | 10^{6} | MGy |
2 | kilogray ......................................... | 10^{3} | kGy |
3 | gray ............................................... | 1 | Gy |
4 | milligray ........................................ | 10^{-3} | mGy |
5 | microgray ...................................... | 10^{-4} | µGy |
6 | nanogray ....................................... | 10^{-9} | nGy |
7 | picogray ........................................ | 10^{-12} | pGy |
8 | gigarad ........................................... | 10^{7} | Grad |
9 | megnrad ........................................ | 10^{4} | Mrad |
10 | kilorad ........................................... | 10 | krad |
11 | rad ................................................. | 10^{-2} | rad |
12 | millirad .......................................... | 10^{-5} | mrad |
Twenty-fourth Schedule
6. The Twenty-fourth Schedule to the Weights and Measures (National Standards) Regulations is amended—
(a) by omitting “ twenty-fourth schedule ” and substituting “ schedule 31 ”.
(b) by omitting from the heading to Part A “ the First Schedule ” and substituting “ Schedule 1 ”;
(c) by omitting from the heading to Part B “ the First Schedule ” and substituting “ Schedule 1 ”;
(d) by omitting from the heading to Part C “ and Weight ”;
(e) by omitting from the heading to Part C “ the Third Schedule ” and substituting “ Schedule 3 ”;
(f) by omitting from the heading to Part D “ and Weight ”;
(g) by omitting from the heading to Part D “ the Third Schedule ” and substituting “ Schedule 3 ”;
(h) by omitting from the heading to Part E “ and Weight ”;
(i) by omitting from the heading to Part F “ and Weight ”;
(j) by omitting from the heading to Part G “ and Weight ”;
(k) by omitting from the heading to Part G “ the Fourth Schedule ” and substituting “ Schedule 3 ”;
(l) by omitting from the heading to Part H “ the Fifth Schedule ” and substituting “ Schedule 4 ”;
(m) by omitting from the heading to Part I “ the Fifth Schedule ” and substituting “ Schedule 4 ”;
(n) by omitting from the heading to Part J “ the Fifth Schedule ” and substituting “ Schedule 4 ”;
(o) by omitting from the heading to Part L “ the Second Schedule ” and substituting “ Schedule 2 ”; and
(p) by omitting from the heading to Part M “ the Second Schedule ” and substituting “ Schedule 2 ”.
Twenty-fifth Schedule
7. The Twenty-fifth Schedule to the Weights and Measures (National Standards) Regulations is amended—
(a) by omitting “ twenty-fifth schedule ” and substituting “ schedule 32 ”;
(b) by omitting from the heading to Part A “ and Weight ”;
(c) by omitting from the heading to Part A “ the Third Schedule ” and substituting “ Schedule 3 ”;
(d.) by omitting from the heading to Part B “ and Weight ”; and
(e) by omitting from the heading to Part B the “ Third Schedule ” and substituting “ Schedule 3 ”.
Twenty-sixth to Thirtieth Schedules (inclusive)
8. The Twenty-sixth to the Thirtieth Schedules (inclusive) to the Weights and Measures (National Standards) Regulations are repealed.
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