Nanowatt is 1e-9 watt units.
Nanowatts to Femtowatts Converter — nW to fW
Convert Nanowatt (nW) to Femtowatt (fW) using the exact conversion factor (1 nanowatt = 1,000,000 femtowatt). See the formula, worked examples, and conversion table.
Nanowatts to Femtowatts 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.
Femtowatt is 1e-15 watt units.
Result = input x 1e-9 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Nanowatts to Femtowatts
Nanowatt and Femtowatt 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: Nanowatt is 1e-9 watt units, and femtowatt is 1e-15 watt units.
Formula
femtowatts = nanowatts × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 nanowatt equals 1e-9 base units, and 1 femtowatt equals 1e-15 base units, so dividing one by the other gives the direct nanowatt-to-femtowatt factor of 1000000.
Simple example
1 nW × 1000000 = 1,000,000 fW
1 nanowatt = 1,000,000 femtowatts.
Real-world example
120 nW × 1000000 = 120,000,000 fW
120 nanowatts = 120,000,000 femtowatts.
Conversion table
| Nanowatt (nW) | Femtowatt (fW) |
|---|---|
| 1 nW | 1,000,000 fW |
| 5 nW | 5,000,000 fW |
| 12 nW | 12,000,000 fW |
| 24 nW | 24,000,000 fW |
| 120 nW | 120,000,000 fW |
| 240 nW | 240,000,000 fW |
Reverse conversion: Femtowatt to Nanowatt
1 fW × 0.000001 = 0.000001 nW
1 femtowatt = 0.000001 nanowatts.
nanowatts = femtowatts × 0.000001
For a page dedicated to this direction, see Femtowatt to Nanowatt.
Understanding the Nanowatt (nW)
Nanowatt is 1e-9 watt units.
Understanding the Femtowatt (fW)
Femtowatt is 1e-15 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtowatts are in 1 nanowatt?
1 nanowatt equals 1,000,000 femtowatts, using the exact defined conversion factor rather than an estimate.
How do I convert nanowatt to femtowatt?
Multiply the nanowatt value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert femtowatt back to nanowatt?
Use the reverse factor: 1 femtowatt equals 0.000001 nanowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanowatt?
Nanowatt (nW) is a unit of electricity.
What is a femtowatt?
Femtowatt (fW) is a unit of electricity.
Is the nanowatt to femtowatt conversion exact?
Yes. Both nanowatt and femtowatt are defined by fixed standards rather than physical artifacts, so the factor of 1000000 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.