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Weights and Measures Act 1985

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Sections 1(2), 8(1).

SCHEDULE 1E+W+S+N.I. Definitions of Units of Measurement

Part IE+W+S+N.I. Measurement of Length

Imperial units

F1. . .F1. . .
F1. . .F1. . .
F1. . .F1. . .
F1. . .F1. . .
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Amendments (Textual)

F1Sch. 1 Pts. I, II: entries omitted (1.10.1995) by virtue of S.I. 1994/2867, reg. 6(5)(a)

Metric unitsE+W+S+N.I.

Kilometre =1000 metres.
METREis the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.
Decimetre =1/10 metre.
Centimetre =1/100 metre.
Millimetre =1/1000 metre.

Part IIE+W+S+N.I. Measurement of Area

Imperial unitsE+W+S+N.I.

F2. . .F2. . .
F2. . .F2. . .
F2. . .F2. . .
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Annotations are used to give authority for changes and other effects on the legislation you are viewing and to convey editorial information. They appear at the foot of the relevant provision or under the associated heading. Annotations are categorised by annotation type, such as F-notes for textual amendments and I-notes for commencement information (a full list can be found in the Editorial Practice Guide). Each annotation is identified by a sequential reference number. For F-notes, M-notes and X-notes, the number also appears in bold superscript at the relevant location in the text. All annotations contain links to the affecting legislation.

Amendments (Textual)

F2Sch. 1 Pts. I, II: entries omitted (1.10.1995) by virtue of S.I. 1994/2867, reg. 6(5)(a)

Metric unitsE+W+S+N.I.

Hectare =100 ares.
Decare =10 ares.
Are =100 square metres.
SQUARE METRE=a superficial area equal to that of a square each side of which measures one metre.
Square decimetre =1/100 square metre.
Square centimetre =1/100 square decimetre.
Square millimetre =1/100 square centimetre.

Part IIIE+W+S+N.I. Measurement of Volume

Metric unitsE+W+S+N.I.

CUBIC METRE =a volume equal to that of a cube each edge of which measures one metre.
Cubic decimetre =1/1000 cubic metre.
Cubic centimetre =1/1000 cubic decimetre.
Hectolitre =100 litres.
LITRE =a cubic decimetre.
Decilitre =1/10 litre.
Centilitre =1/100 litre.
Millilitre =1/1000 litre.

Part IVE+W+S+N.I. Measurement of Capacity

[F3Imperial unit]E+W+S+N.I.

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Amendments (Textual)

F3Heading in Sch. 1 Pt. IV substituted (1.1.2000) by S.I. 1994/2867, reg. 7(3)(a)(i)

F4. . .F4. . .
F4. . .F4. . .
Pint =[F5 0.568 261 25 cubic decimetre.]
F4. . .F4. . .
F6. . .F6. . .
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Amendments (Textual)

F4Sch. 1 Pt. IV: definitions of

gallon

,

quart

and

gill

omitted (1.10.1995) by virtue of S.I. 1994/2867, reg. 6(5)(b)(i)

F5Sch. 1 Pt. IV: definition substituted (1.10.1995) by S.I. 1994/2867, reg. 6(5)(b)(ii)

F6Sch. 1 Pt. IV: definition of

fluid ounce

omitted (1.1.2000) by virtue of S.I. 1994/2867, reg. 7(3)(a)(ii)

Metric unitsE+W+S+N.I.

Hectolitre =100 litres.
LITRE =a cubic decimetre.
Decilitre =1/10 litre.
Centilitre =1/100 litre.
Millilitre =1/1000 litre.

Part VE+W+S+N.I. Measurement of Mass or Weight

[F7Imperial unit]E+W+S+N.I.

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Amendments (Textual)

F7Heading in Sch. 1 Pt. V substituted (1.1.2000) by S.I. 1994/2867, reg. 7(3)(b)(i)

F8. . .F8. . .
F8. . .F8. . .
[F9OUNCE TROY=][F9 0.031 103 476 8 kilogram.]
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Amendments (Textual)

F8Sch. 1 Pt. V: definitions of

pound

and

ounce

omitted (1.1.2000) by virtue of S.I. 1994/2867, reg. 7(3)(b)(ii)

F9Sch. 1 Pt. V: definition of

ounce troy

substituted (1.1.2000) by S.I. 1994/2867, reg. 7(3)(b)(iii)

Metric unitsE+W+S+N.I.

Tonne, metric tonne =1000 kilograms.
KILOGRAM=is the unit of mass; it is equal to the mass of the international prototype of the kilogram.
Hectogram =1/10 kilogram.
Gram =1/1000 kilogram.
Carat (metric) =1/5 gram.
Milligram =1/1000 gram.

[F10PART VIE+W+S+N.I.Definitions of certain units which may not be used for trade except as supplementary indications

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Amendments (Textual)

F10Sch. 1 Pt. VI substituted (1.10.1995) by S.I. 1994/2867, reg. 6(5)(c)

F11Measurement of length
Mile=1760 yards.
Furlong=220 yards.
Chain=22 yards.
YARD=0.9144 metre.
Foot=1/3 yard.
Inch=1/36 yard.
Measurement of area
Square mile=640 acres.
Acre=4840 square yards.
Rood=1210 square yards.
Square yard=a superficial area equal to that of a square each side of which measures one yard.
Square foot=1/9 square yard.
Square inch=1/144 square foot.
Measurement of volume
Cubic yard=a volume equal to that of a cube each edge of which measures one yard.
Cubic foot=1/27 cubic yard.
Cubic inch=1/1728 cubic foot.
Measurement of capacity
Bushel=87 gallons.
Peck=2 gallons
GALLON=4.54609 cubic decimetres.
Quart=¼ gallon.
Gill=¼ pint.
[F12Fluid ounce][F12=][F121/20 pint.]
Fluid drachm=1/8 fluid ounce.
Minim=1/60 fluid drachm.
Measurement of mass or weight
Ton=2240 pounds.
Hundredweight=112 pounds.
Cental=100 pounds.
Quarter=28 pounds.
Stone=14 pounds.
[F13POUND][F13=][F13 0.453 592 37 kilogram.]
[F14 Ounce][F14=][F141/16 pound]
Dram=1/16 ounce.
Grain=1/7000 pound.
Pennyweight=24 grains.
Ounce apothecaries=480 grains.
Drachm=1/8 ounce apothecaries.
Scruple=1/3 drachm.
Metric ton=1000 kilograms.
Quintal=100 kilograms.]
Annotations: Help about Annotation
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Annotations are used to give authority for changes and other effects on the legislation you are viewing and to convey editorial information. They appear at the foot of the relevant provision or under the associated heading. Annotations are categorised by annotation type, such as F-notes for textual amendments and I-notes for commencement information (a full list can be found in the Editorial Practice Guide). Each annotation is identified by a sequential reference number. For F-notes, M-notes and X-notes, the number also appears in bold superscript at the relevant location in the text. All annotations contain links to the affecting legislation.

Amendments (Textual)

F11Sch. 1 Pt. VI substituted (1.10.1995) by S.I. 1994/2867, reg. 6(5)(c)

F12Sch. 1 Pt. VI: definition of

Fluid ounce

inserted (1.1.2000) by S.I. 1994/2867, reg. 7(3)(c)(i)

F13Sch. 1 Pt. VI: definition of

POUND

inserted (1.1.2000) by S.I. 1994/2867, reg. 7(3)(c)(ii)

F14Sch. 1 Pt. VI: definition of

Ounce

inserted (1.1.2000) by S.I. 1994/2867, reg. 7(3)(c)(ii)

Part VIIE+W+S+N.I. Measurement of Electricity

1.(a) AMPEREis that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section and placed 1 metre apart in vacuum, would produce between these conductors a force equal to 2 x 10–7 newton per metre of length.
(b) OHMis the electric resistance between two points of a conductor when a constant potential difference of 1 volt, applied between the two points, produces in the conductor a current of 1 ampere, the conductor not being the seat of any electromotive force.
(c) VOLTis the difference of electric potential between two points of a conducting wire carrying a constant current of 1 ampere when the power dissipated between these points is equal to 1 watt.
(d) WATTis the power which in one second gives rise to energy of 1 joule.
2.Kilowatt= 1000 watts.
Megawatt= one million watts.

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