Metric units Metric units
| Tonne, metric tonne = | 1000 kilograms. |
| KILOGRAM | F1for which the symbol “kg” is used, is the SI unit of mass, defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 x 10-34 when expressed in the unit J s, which is equal to kg m2 s-1, where the second is defined by taking the fixed numerical value of the caesium frequency ΔvCs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s-1. |
| Hectogram = | 1/10 kilogram. |
| Gram = | 1/1000 kilogram. |
| Carat (metric) = | 1/5 gram. |
| Milligram = | 1/1000 gram. |
Annotations
Textual amendments
- F1
Words in Sch. 1 Pt. 5 substituted (13.6.2020) by The Weights and Measures Act 1985 (Definitions of Metre and Kilogram) (Amendment) Order 2020 (S.I. 2020/586), arts. 1(b), 2(3)