IEVref: 112-02-06 ID: Language: en Status: Standard Term: kilogram Synonym1: Synonym2: Synonym3: Symbol: kg Definition: SI unit of mass, taking the fixed numerical value of the Planck constant h to be 6,626 070 15 × 10−34 when expressed in the unit s−1 m2 kg, where the metre and the second are chosen as units of length and time, respectively Note 1 to entry: The definition in the SI Brochure is: "The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6,626 070 15 × 10−34 when expressed in the unit J s, which is equal to kg m2 s−1, where the metre and the second are defined in terms of c and ΔνCs." Note 2 to entry: The definition of the kilogram in IEV 112-02-06:2010-01 was: "SI unit of mass, equal to the mass of the object called the “international prototype of the kilogram” kept at the International Bureau of Weights and Measures (BIPM)." Note 3 to entry: The kilogram is one of the seven SI base units: second (s), metre (m), kilogram (kg), ampere (A), kelvin (K), mole (mol) and candela (cd). Publication date: 2020-12 Source: SI Brochure, 9th edition, 2019, 2.3.1, modified – The definition in the SI Brochure has been revised to comply with the IEV rules. Notes 1 to 3 to entry have been added. Replaces: 112-02-06:2010-01 Internal notes: 2020-12-14: Tagging error corrected in Note 1 to entry: c corrected to c. JGO CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: