Millisiemens (mS)
The millisiemens (mS) equals 0.001 siemens — used for higher-conductivity solutions and industrial process water.
Millisiemens appear when EC readings exceed the microsiemens range, such as seawater and concentrated brines.
Millisiemens to Microsiemens
Convert millisiemens to microsiemens instantly. Type in either field — results update live.
Instant
Private
Free
electric-conductance Millisiemens Microsiemens
1 millisiemens = 1,000 microsiemenss
Unit
Unit
Conversion table
Selected mS values converted to µS using the exact factor from this tool.
| mS | µS |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 1,000 | 1,000,000.0000000001 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 mS = 1000 µS
1 µS = 0.001 mS
To convert millisiemens to microsiemens, multiply by 1000.
To convert microsiemens to millisiemens, multiply by 0.001.
Example: convert 10 mS to µS
10 × 1000 = 10000 µS
About these units
Short background on the units used in this conversion.
Microsiemens (µS)
The microsiemens (µS) equals 10⁻⁶ siemens — the common unit on water-quality and conductivity (EC) meters.
Microsiemens measure dissolved-ion conductivity in aquariums, hydroponics, boiler water, and environmental monitoring.
Frequently asked questions
How many microsiemenss are in one millisiemens?
One millisiemens equals 1,000 microsiemenss. Multiply your millisiemenss value by 1,000 to convert to microsiemenss.
What is the conversion formula?
µS = mS × 1,000The reverse is
mS = µS × 0.001, using the same exact factors as this converter.Is this Millisiemens to Microsiemens converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.