maratoolHow to convert siemens, mho, and microsiemens
Type a conductance — read S, mS, µS, or mho instantly.
Conductance is the reciprocal of resistance, and its unit went from mho to siemens in 1971. The Conductance Converter handles both plus every SI prefix.
How it works
- Pick units — "Microsiemens (µS)" to "Millisiemens (mS)", or any other pair.
- Type a value — the result updates as you type, with swap and copy.
- Copy — one click, with "Copied!" feedback.
Electrical conductance conversion factors
Every unit converts through the siemens (the base unit). To convert A → B, multiply by A's factor and divide by B's:
| Unit | = this many siemenss |
|---|---|
| Kilosiemens (kS) | 1,000 |
| Siemens (S) | 1 |
| Millisiemens (mS) | 0.001 |
| Microsiemens (µS) | 1.0000 × 10^-6 |
| Mho (℧) | 1 |
| Micromho (µ℧) | 1.0000 × 10^-6 |
| Abmho (ab℧) | 1.0000 × 10^9 |
| Statmho (stat℧) | 1.1127 × 10^-12 |
When you need it
Conversions are exact prefix shifts: 1 mS = 1,000 µS, and mho = siemens one-for-one. To cross to resistance, invert: 500 µS is 2 kΩ. Water-quality meters quote µS/cm — the prefix math is the same.
Sources & methodology
Conversion factors follow NIST Special Publication 811; exact-by-definition factors are marked in the tool itself. All math runs client-side in your browser — nothing is uploaded.
More conversion guides
- How to convert ohms, kΩ, and MΩ resistor values
- How to convert milliamps to amps (and other current units)
- How to convert µF, nF, and pF capacitor values
Or browse everything at once in the new unit & sizing converters roundup.