# Council Directive of 20 December 1979 on the approximation of the laws of the Member States relating to units of measurement and on the repeal of Directive 71/354/EEC (80/181/EEC), Chapter III: LEGAL UNITS OF MEASUREMENT REFERRED TO IN ARTICLE 1 (c)

Extent: E+W+S+N.I.

QUANTITIES, NAMES OF UNITS, SYMBOLS AND APPROXIMATE VALUES
Length
inch
1 in
= 2·54 × 10 -2 m
foot
1 ft
= 0·3048 m
mile
1 mile
= 1 609 m
yard
1 yard
= 0·9144 m
Area
square foot
1 sq ft
= 0·929 × 10 -1 m 2
acre
1 ac
= 4 047 m 2
square yard
1 sq yd
= 0·8361 m 2
Volume
fluid ounce
1 fl oz
= 28·41 × 10 -6 m 3
gill
1 gill
= 0·1421 × 10 -3 m 3
pint
1 pt
= 0·5683 × 10 -3 m 3
quart
1 qt
= 1·137 × 10 -3 m 3
gallon
1 gal
= 4·546 × 10 -3 m 3
Mass
ounce (avoirdupois)
1 oz
= 28·35 × 10 -3 kg
troy ounce
1 oz tr
= 31·10 × 10 -3 kg
pound
1 lb
= 0·4536 kg
Energy
therm
1 therm
= 105·506 × 10 6 J
Until the date to be fixed under Article 1 (c), the units listed in Chapter III may be combined with each other or with those in Chapter I to form compound units.

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Source: https://www.legislation.gov.uk/eudr/1980/181/annex/chapter/III (the official version)
Page: https://openlegislation.uk/eu-directive-1980-181/annex/chapter-III
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.