Femtowatt is 1e-15 watt units.
Femtowatts to Nanowatts Converter — fW to nW
Convert Femtowatt (fW) to Nanowatt (nW) using the exact conversion factor (1 femtowatt = 0.000001 nanowatt). See the formula, worked examples, and conversion table.
Femtowatts to Nanowatts converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Nanowatt is 1e-9 watt units.
Result = input x 1e-15 / 1e-9.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Femtowatts to Nanowatts
Femtowatt and Nanowatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Femtowatt is 1e-15 watt units, and nanowatt is 1e-9 watt units.
Formula
nanowatts = femtowatts × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 femtowatt equals 1e-15 base units, and 1 nanowatt equals 1e-9 base units, so dividing one by the other gives the direct femtowatt-to-nanowatt factor of 0.000001.
Simple example
1 fW × 0.000001 = 0.000001 nW
1 femtowatt = 0.000001 nanowatts.
Real-world example
100 fW × 0.000001 = 0.0001 nW
100 femtowatts = 0.0001 nanowatts.
Conversion table
| Femtowatt (fW) | Nanowatt (nW) |
|---|---|
| 1 fW | 0.000001 nW |
| 10 fW | 0.00001 nW |
| 50 fW | 0.00005 nW |
| 100 fW | 0.0001 nW |
| 500 fW | 0.0005 nW |
| 1,000 fW | 0.001 nW |
Reverse conversion: Nanowatt to Femtowatt
0.000001 nW × 1000000 = 1 fW
0.000001 nanowatts = 1 femtowatt.
femtowatts = nanowatts × 1000000
For a page dedicated to this direction, see Nanowatt to Femtowatt.
Understanding the Femtowatt (fW)
Femtowatt is 1e-15 watt units.
Understanding the Nanowatt (nW)
Nanowatt is 1e-9 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanowatts are in 1 femtowatt?
1 femtowatt equals 0.000001 nanowatts, using the exact defined conversion factor rather than an estimate.
How do I convert femtowatt to nanowatt?
Multiply the femtowatt value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert nanowatt back to femtowatt?
Use the reverse factor: 1 nanowatt equals 1,000,000 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 engineering.
What is a nanowatt?
Nanowatt (nW) is a unit of engineering.
Is the femtowatt to nanowatt conversion exact?
Yes. Both femtowatt and nanowatt are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.