Microsiemens is 0.000001 siemens units.
Microsiemens to Millisiemens Converter — uS to mS
Convert Microsiemens (uS) to Millisiemens (mS) using the exact conversion factor (1 microsiemens = 0.001 millisiemens). See the formula, worked examples, and conversion table.
Microsiemens to Millisiemens 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.
Millisiemens is 0.001 siemens units.
Result = input x 1e-6 / 0.001.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Microsiemens to Millisiemens
Microsiemens and Millisiemens 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: Microsiemens is 0.000001 siemens units, and millisiemens is 0.001 siemens units.
Formula
millisiemens = microsiemens × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 microsiemens equals 0.000001 base units, and 1 millisiemens equals 0.001 base units, so dividing one by the other gives the direct microsiemens-to-millisiemens factor of 0.001.
Simple example
1 uS × 0.001 = 0.001 mS
1 microsiemens = 0.001 millisiemens.
Real-world example
120 uS × 0.001 = 0.12 mS
120 microsiemens = 0.12 millisiemens.
Conversion table
| Microsiemens (uS) | Millisiemens (mS) |
|---|---|
| 1 uS | 0.001 mS |
| 5 uS | 0.005 mS |
| 12 uS | 0.012 mS |
| 24 uS | 0.024 mS |
| 120 uS | 0.12 mS |
| 240 uS | 0.24 mS |
Reverse conversion: Millisiemens to Microsiemens
0.001 mS × 1000 = 1 uS
0.001 millisiemens = 1 microsiemens.
microsiemens = millisiemens × 1000
For a page dedicated to this direction, see Millisiemens to Microsiemens.
Understanding the Microsiemens (uS)
Microsiemens is 0.000001 siemens units.
Understanding the Millisiemens (mS)
Millisiemens is 0.001 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millisiemens are in 1 microsiemens?
1 microsiemens equals 0.001 millisiemens, using the exact defined conversion factor rather than an estimate.
How do I convert microsiemens to millisiemens?
Multiply the microsiemens value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert millisiemens back to microsiemens?
Use the reverse factor: 1 millisiemens equals 1,000 microsiemens. You can also use the swap control in the converter above to flip the direction instantly.
What is a microsiemens?
Microsiemens (uS) is a unit of electricity.
What is a millisiemens?
Millisiemens (mS) is a unit of electricity.
Is the microsiemens to millisiemens conversion exact?
Yes. Both microsiemens and millisiemens are defined by fixed standards rather than physical artifacts, so the factor of 0.001 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.