Siemens is the SI unit of conductance.
Siemens to Nanosiemens Converter — S to nS
Convert Siemens (S) to Nanosiemens (nS) using the exact conversion factor (1 siemens = 1,000,000,000 nanosiemens). See the formula, worked examples, and conversion table.
Siemens to Nanosiemens 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.
Nanosiemens is 1e-9 siemens units.
Result = input x 1 / 1e-9.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Siemens to Nanosiemens
Siemens and Nanosiemens 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 nanosiemens is 1e-9 siemens units.
Formula
nanosiemens = siemens × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 siemens equals 1 base unit, and 1 nanosiemens equals 1e-9 base units, so dividing one by the other gives the direct siemens-to-nanosiemens factor of 1000000000.
Simple example
1 S × 1000000000 = 1,000,000,000 nS
1 siemens = 1,000,000,000 nanosiemens.
Real-world example
120 S × 1000000000 = 120,000,000,000 nS
120 siemens = 120,000,000,000 nanosiemens.
Conversion table
| Siemens (S) | Nanosiemens (nS) |
|---|---|
| 1 S | 1,000,000,000 nS |
| 5 S | 5,000,000,000 nS |
| 12 S | 12,000,000,000 nS |
| 24 S | 24,000,000,000 nS |
| 120 S | 120,000,000,000 nS |
| 240 S | 240,000,000,000 nS |
Reverse conversion: Nanosiemens to Siemens
1 nS × 1e-9 = 1e-9 S
1 nanosiemens = 1e-9 siemens.
siemens = nanosiemens × 1e-9
For a page dedicated to this direction, see Nanosiemens to Siemens.
Understanding the Siemens (S)
Siemens is the SI unit of conductance.
Understanding the Nanosiemens (nS)
Nanosiemens is 1e-9 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanosiemens are in 1 siemens?
1 siemens equals 1,000,000,000 nanosiemens, using the exact defined conversion factor rather than an estimate.
How do I convert siemens to nanosiemens?
Multiply the siemens value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert nanosiemens back to siemens?
Use the reverse factor: 1 nanosiemens equals 1e-9 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 nanosiemens?
Nanosiemens (nS) is a unit of electricity.
Is the siemens to nanosiemens conversion exact?
Yes. Both siemens and nanosiemens are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.