Siemens per Metre (S/m)
The siemens per metre is the SI unit of conductivity (σ), the reciprocal of resistivity: σ = 1/ρ. Copper is about 5.8 × 10⁷ S/m; seawater about 5 S/m.
Symbol: S/m
Quantity: electrical conductivity
SI relation: S/m is the coherent SI unit of electrical conductivity.
Derivation: The SI unit of electrical conductivity σ = 1/ρ
Exact: yes, by definition
Typical uses
- Conductor and alloy properties
- Water and soil conductivity
- Electromagnetic and eddy-current calculations
Convert siemens per metre to other units
| Conversion | 1 S/m equals | Reverse |
|---|---|---|
| siemens per metre to percent IACS | 0.000001724137931 %IACS | percent IACS to siemens per metre |
| siemens per metre to millisiemens per centimetre | 10 mS/cm | millisiemens per centimetre to siemens per metre |
| siemens per metre to microsiemens per centimetre | 10000 µS/cm | microsiemens per centimetre to siemens per metre |
| siemens per metre to megasiemens per metre | 0.000001 MS/m | megasiemens per metre to siemens per metre |
| siemens per metre to decisiemens per metre | 10 dS/m | decisiemens per metre to siemens per metre |
| siemens per metre to siemens per centimetre | 0.01 S/cm | siemens per centimetre to siemens per metre |
| siemens per metre to millisiemens per metre | 1000 mS/m | millisiemens per metre to siemens per metre |
Open the Electrical Conductivity Converter to convert any value between all units.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Siemens per Metre (S/m). Retrieved October 25, 2026, from https://scientificconverters.com/units/siemens-per-meter/
IEEE
Scientific Converters, "Siemens per Metre (S/m)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/siemens-per-meter/