Siemens is the SI unit of conductance.
Siemens to Centisiemens Converter — S to cS
Convert Siemens (S) to Centisiemens (cS) using the exact conversion factor (1 siemens = 100 centisiemens). See the formula, worked examples, and conversion table.
Siemens to Centisiemens 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.
Centisiemens is 0.01 siemens units.
Result = input x 1 / 0.01.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Siemens to Centisiemens
Siemens and Centisiemens 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: Siemens is the SI unit of conductance, and centisiemens is 0.01 siemens units.
Formula
centisiemens = siemens × 100
This factor comes from each unit's defined relationship to the category's base unit: 1 siemens equals 1 base unit, and 1 centisiemens equals 0.01 base units, so dividing one by the other gives the direct siemens-to-centisiemens factor of 100.
Simple example
1 S × 100 = 100 cS
1 siemens = 100 centisiemens.
Real-world example
120 S × 100 = 12,000 cS
120 siemens = 12,000 centisiemens.
Conversion table
| Siemens (S) | Centisiemens (cS) |
|---|---|
| 1 S | 100 cS |
| 5 S | 500 cS |
| 12 S | 1,200 cS |
| 24 S | 2,400 cS |
| 120 S | 12,000 cS |
| 240 S | 24,000 cS |
Reverse conversion: Centisiemens to Siemens
100 cS × 0.01 = 1 S
100 centisiemens = 1 siemens.
siemens = centisiemens × 0.01
For a page dedicated to this direction, see Centisiemens to Siemens.
Understanding the Siemens (S)
Siemens is the SI unit of conductance.
Understanding the Centisiemens (cS)
Centisiemens is 0.01 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many centisiemens are in 1 siemens?
1 siemens equals 100 centisiemens, using the exact defined conversion factor rather than an estimate.
How do I convert siemens to centisiemens?
Multiply the siemens value by 100. The converter above does this instantly to whatever precision you set.
How do I convert centisiemens back to siemens?
Use the reverse factor: 1 centisiemens equals 0.01 siemens. You can also use the swap control in the converter above to flip the direction instantly.
What is a siemens?
Siemens (S) is a unit of electricity.
What is a centisiemens?
Centisiemens (cS) is a unit of electricity.
Is the siemens to centisiemens conversion exact?
Yes. Both siemens and centisiemens are defined by fixed standards rather than physical artifacts, so the factor of 100 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.