electrical conductance · International · Modern
SI derived unit of electric conductance; 1 S = 1 A/V = 1 Ω⁻¹.
Converter
electrical conductance · International / US legacy · Modern/historical
mho
exact
- Record
- M345
- Definition quality
- Exact by definition
- Conversion mode
- multiplicative
- Calculator
- Fully calculable
Definition
1 mho = 1 S
Reference value
One mho is exactly 1 siemens.
History & use
The name is 'ohm' written backward, reflecting that conductance is the reciprocal of resistance. NIST identifies mho as a former name and recommends siemens in SI usage.
Modern use
Modern use is context-dependent and varies by region or measurement system.