Converter
amount of substance · International · Modern
mole
exact
- Record
- M044
- Definition quality
- Exact by definition
- Conversion mode
- multiplicative
- Calculator
- Fully calculable
Definition
1 mol contains exactly 6.02214076×10²³ specified elementary entities
History & use
The mole became an SI base unit in 1971. Since 20 May 2019 its definition fixes the numerical value of the Avogadro constant rather than depending on a carbon-12 mass definition.
Modern use
Modern use is context-dependent and varies by region or measurement system.
Sources & evidence
Source tier — · confidence high