Use of the symbols for units
•
Symbols should be used to denote the units when reporting numerical results,
and the full name when referring to units in written text. The symbol should be
separated from the last digit by a single space, e.g. 273.15 K not 273.15 K.
•
When reporting quantities with compound units formed by the product of two or
more units, the unit symbols should be separated by a half-high dot, dot or a space;
for example, for metre-kelvin: m.K or m.K or m K, but not mK, which implies
millikelvin.
•
When reporting quantities with compound units formed by ratios of two or more
units, exponentiation or a single solidus may be used. Parentheses should be used
to prevent ambiguities: for example, W/m
2
or W.m
−
2
; J/(kg.
°
C) or J.kg
−
1
°
C
−
1
not
J/kg/
°
C.