Division 1.4 Special authorized names and symbols of decimal multiples and submultiples of SI unitsX1

United Kingdom

Quantity	Unit
The two symbols ‘ I ’ and ‘ L ’ may be used for the litre unit. (Sixteenth CGPM (1979), resolution 6).
Unit listed in the International Bureau of Weights and Measures booklet as among the units to be permitted temporarily.
Quantity	Name	Symbol	Value
Volume	litre	1 or L ^f1	1 l = 1 dm ³ = 10 ^-3 m ³
Mass	tonne	t	1 t = 1 Mg = 10 ³ kg
Pressure, stress	bar	bar ^f2	1 bar = 10 ⁵ Pa

Annotations

X1: Substituted by Corrigendum to Council Directive 80/181/EEC of 20 December 1979 on the aproximation of the laws of the Member States relating to units of measurement and on the repeal of Directive 71/354/EEC (Official Journal of the European Communities No L 39 of 15 February 1980).

f1

The two symbols ‘ I ’ and ‘ L ’ may be used for the litre unit.

(Sixteenth CGPM (1979), resolution 6).

f2

Unit listed in the International Bureau of Weights and Measures booklet as among the units to be permitted temporarily.