Microsiemens is 0.000001 siemens units.
Microsiemens to Femtosiemens Converter — uS to fS
Convert Microsiemens (uS) to Femtosiemens (fS) using the exact conversion factor (1 microsiemens = 1,000,000,000 femtosiemens). See the formula, worked examples, and conversion table.
Microsiemens to Femtosiemens 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.
Femtosiemens is 1e-15 siemens units.
Result = input x 1e-6 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Microsiemens to Femtosiemens
Microsiemens and Femtosiemens 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 femtosiemens is 1e-15 siemens units.
Formula
femtosiemens = microsiemens × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 microsiemens equals 0.000001 base units, and 1 femtosiemens equals 1e-15 base units, so dividing one by the other gives the direct microsiemens-to-femtosiemens factor of 1000000000.
Simple example
1 uS × 1000000000 = 1,000,000,000 fS
1 microsiemens = 1,000,000,000 femtosiemens.
Real-world example
120 uS × 1000000000 = 120,000,000,000 fS
120 microsiemens = 120,000,000,000 femtosiemens.
Conversion table
| Microsiemens (uS) | Femtosiemens (fS) |
|---|---|
| 1 uS | 1,000,000,000 fS |
| 5 uS | 5,000,000,000 fS |
| 12 uS | 12,000,000,000 fS |
| 24 uS | 24,000,000,000 fS |
| 120 uS | 120,000,000,000 fS |
| 240 uS | 240,000,000,000 fS |
Reverse conversion: Femtosiemens to Microsiemens
1 fS × 1e-9 = 1e-9 uS
1 femtosiemens = 1e-9 microsiemens.
microsiemens = femtosiemens × 1e-9
For a page dedicated to this direction, see Femtosiemens to Microsiemens.
Understanding the Microsiemens (uS)
Microsiemens is 0.000001 siemens units.
Understanding the Femtosiemens (fS)
Femtosiemens is 1e-15 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtosiemens are in 1 microsiemens?
1 microsiemens equals 1,000,000,000 femtosiemens, using the exact defined conversion factor rather than an estimate.
How do I convert microsiemens to femtosiemens?
Multiply the microsiemens value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert femtosiemens back to microsiemens?
Use the reverse factor: 1 femtosiemens equals 1e-9 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 femtosiemens?
Femtosiemens (fS) is a unit of electricity.
Is the microsiemens to femtosiemens conversion exact?
Yes. Both microsiemens and femtosiemens 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.