Millisiemens per Metre (mS/m)
The millisiemens per metre is 10⁻³ S/m. Drinking-water regulations in some countries quote conductivity in mS/m.
Symbol: mS/m
Quantity: electrical conductivity
SI relation: 1 mS/m = 0.001 S/m (exact)
Derivation: 1 mS/m = 10⁻³ S/m = 10 µS/cm
Exact: yes, by definition
Typical uses
- Drinking-water regulations (for example in the EU)
- Groundwater and environmental monitoring
Convert millisiemens per metre to other units
| Conversion | 1 mS/m equals | Reverse |
|---|---|---|
| millisiemens per metre to siemens per metre | 0.001 S/m | siemens per metre to millisiemens per metre |
| millisiemens per metre to percent IACS | 1.724137931 × 10⁻⁹ %IACS | percent IACS to millisiemens per metre |
| millisiemens per metre to millisiemens per centimetre | 0.01 mS/cm | millisiemens per centimetre to millisiemens per metre |
| millisiemens per metre to microsiemens per centimetre | 10 µS/cm | microsiemens per centimetre to millisiemens per metre |
| millisiemens per metre to megasiemens per metre | 1 × 10⁻⁹ MS/m | megasiemens per metre to millisiemens per metre |
| millisiemens per metre to decisiemens per metre | 0.01 dS/m | decisiemens per metre to millisiemens per metre |
| millisiemens per metre to siemens per centimetre | 0.00001 S/cm | siemens per centimetre to millisiemens 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). Millisiemens per Metre (mS/m). Retrieved October 25, 2026, from https://scientificconverters.com/units/millisiemens-per-meter/
IEEE
Scientific Converters, "Millisiemens per Metre (mS/m)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/millisiemens-per-meter/