Femtowatt is 1e-15 watt units.
Femtowatts to Microwatts Converter — fW to uW
Convert Femtowatt (fW) to Microwatt (uW) using the exact conversion factor (1 femtowatt = 1e-9 microwatt). See the formula, worked examples, and conversion table.
Femtowatts to Microwatts 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.
Microwatt is 0.000001 watt units.
Result = input x 1e-15 / 1e-6.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtowatts to Microwatts
Femtowatt and Microwatt 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: Femtowatt is 1e-15 watt units, and microwatt is 0.000001 watt units.
Formula
microwatts = femtowatts × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 femtowatt equals 1e-15 base units, and 1 microwatt equals 0.000001 base units, so dividing one by the other gives the direct femtowatt-to-microwatt factor of 1e-9.
Simple example
1 fW × 1e-9 = 1e-9 uW
1 femtowatt = 1e-9 microwatts.
Real-world example
120 fW × 1e-9 = 1.2e-7 uW
120 femtowatts = 1.2e-7 microwatts.
Conversion table
| Femtowatt (fW) | Microwatt (uW) |
|---|---|
| 1 fW | 1e-9 uW |
| 5 fW | 5e-9 uW |
| 12 fW | 1.2e-8 uW |
| 24 fW | 2.4e-8 uW |
| 120 fW | 1.2e-7 uW |
| 240 fW | 2.4e-7 uW |
Reverse conversion: Microwatt to Femtowatt
1e-9 uW × 1000000000 = 1 fW
1e-9 microwatts = 1 femtowatt.
femtowatts = microwatts × 1000000000
For a page dedicated to this direction, see Microwatt to Femtowatt.
Understanding the Femtowatt (fW)
Femtowatt is 1e-15 watt units.
Understanding the Microwatt (uW)
Microwatt is 0.000001 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many microwatts are in 1 femtowatt?
1 femtowatt equals 1e-9 microwatts, using the exact defined conversion factor rather than an estimate.
How do I convert femtowatt to microwatt?
Multiply the femtowatt value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert microwatt back to femtowatt?
Use the reverse factor: 1 microwatt equals 1,000,000,000 femtowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtowatt?
Femtowatt (fW) is a unit of electricity.
What is a microwatt?
Microwatt (uW) is a unit of electricity.
Is the femtowatt to microwatt conversion exact?
Yes. Both femtowatt and microwatt 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.