Siemens is the SI unit of conductance.
Siemens to Gigasiemens Converter — S to GS
Convert Siemens (S) to Gigasiemens (GS) using the exact conversion factor (1 siemens = 1e-9 gigasiemens). See the formula, worked examples, and conversion table.
Siemens to Gigasiemens 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.
Gigasiemens is 1000000000 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 Gigasiemens
Siemens and Gigasiemens 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 gigasiemens is 1000000000 siemens units.
Formula
gigasiemens = siemens × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 siemens equals 1 base unit, and 1 gigasiemens equals 1000000000 base units, so dividing one by the other gives the direct siemens-to-gigasiemens factor of 1e-9.
Simple example
1 S × 1e-9 = 1e-9 GS
1 siemens = 1e-9 gigasiemens.
Real-world example
120 S × 1e-9 = 1.2e-7 GS
120 siemens = 1.2e-7 gigasiemens.
Conversion table
| Siemens (S) | Gigasiemens (GS) |
|---|---|
| 1 S | 1e-9 GS |
| 5 S | 5e-9 GS |
| 12 S | 1.2e-8 GS |
| 24 S | 2.4e-8 GS |
| 120 S | 1.2e-7 GS |
| 240 S | 2.4e-7 GS |
Reverse conversion: Gigasiemens to Siemens
1e-9 GS × 1000000000 = 1 S
1e-9 gigasiemens = 1 siemens.
siemens = gigasiemens × 1000000000
For a page dedicated to this direction, see Gigasiemens to Siemens.
Understanding the Siemens (S)
Siemens is the SI unit of conductance.
Understanding the Gigasiemens (GS)
Gigasiemens is 1000000000 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigasiemens are in 1 siemens?
1 siemens equals 1e-9 gigasiemens, using the exact defined conversion factor rather than an estimate.
How do I convert siemens to gigasiemens?
Multiply the siemens value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert gigasiemens back to siemens?
Use the reverse factor: 1 gigasiemens equals 1,000,000,000 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 gigasiemens?
Gigasiemens (GS) is a unit of electricity.
Is the siemens to gigasiemens conversion exact?
Yes. Both siemens and gigasiemens are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 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.