Millisiemens is 0.001 siemens units.
Millisiemens to Microsiemens Converter — mS to uS
Convert Millisiemens (mS) to Microsiemens (uS) using the exact conversion factor (1 millisiemens = 1,000 microsiemens). See the formula, worked examples, and conversion table.
Millisiemens to Microsiemens converter
Converter
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
Context values
Some unit families need one extra value for a physically accurate result.
Microsiemens is 0.000001 siemens units.
Result = input x 0.001 / 1e-6.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Millisiemens to Microsiemens
Millisiemens and Microsiemens both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. Specifically: Millisiemens is 0.001 siemens units, and microsiemens is 0.000001 siemens units.
Formula
microsiemens = millisiemens × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 millisiemens equals 0.001 base units, and 1 microsiemens equals 0.000001 base units, so dividing one by the other gives the direct millisiemens-to-microsiemens factor of 1000.
Simple example
1 mS × 1000 = 1,000 uS
1 millisiemens = 1,000 microsiemens.
Real-world example
120 mS × 1000 = 120,000 uS
120 millisiemens = 120,000 microsiemens.
Conversion table
| Millisiemens (mS) | Microsiemens (uS) |
|---|---|
| 1 mS | 1,000 uS |
| 5 mS | 5,000 uS |
| 12 mS | 12,000 uS |
| 24 mS | 24,000 uS |
| 120 mS | 120,000 uS |
| 240 mS | 240,000 uS |
Reverse conversion: Microsiemens to Millisiemens
1 uS × 0.001 = 0.001 mS
1 microsiemens = 0.001 millisiemens.
millisiemens = microsiemens × 0.001
For a page dedicated to this direction, see Microsiemens to Millisiemens.
Understanding the Millisiemens (mS)
Millisiemens is 0.001 siemens units.
Understanding the Microsiemens (uS)
Microsiemens is 0.000001 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many microsiemens are in 1 millisiemens?
1 millisiemens equals 1,000 microsiemens, using the exact defined conversion factor rather than an estimate.
How do I convert millisiemens to microsiemens?
Multiply the millisiemens value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert microsiemens back to millisiemens?
Use the reverse factor: 1 microsiemens equals 0.001 millisiemens. You can also use the swap control in the converter above to flip the direction instantly.
What is a millisiemens?
Millisiemens (mS) is a unit of electricity.
What is a microsiemens?
Microsiemens (uS) is a unit of electricity.
Is the millisiemens to microsiemens conversion exact?
Yes. Both millisiemens and microsiemens are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.