Gigawatt is 1000000000 watt units.
Gigawatts to Femtowatts Converter — GW to fW
Convert Gigawatt (GW) to Femtowatt (fW) using the exact conversion factor (1 gigawatt = 1e+24 femtowatt). See the formula, worked examples, and conversion table.
Gigawatts to Femtowatts converter
Converter
Power Converter
Convert watts, horsepower, refrigeration tons, BTU per hour, and engineering power units.
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.
Power uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gigawatts to Femtowatts
Gigawatt and Femtowatt both describe power output, and the conversion is a routine part of comparing an engine or motor's spec sheet across countries that use different power units. Specifically: Gigawatt is 1000000000 watt units, and femtowatt is 1e-15 watt units.
Formula
femtowatts = gigawatts × 1e+24
This factor comes from each unit's defined relationship to the category's base unit: 1 gigawatt equals 1000000000 base units, and 1 femtowatt equals 1e-15 base units, so dividing one by the other gives the direct gigawatt-to-femtowatt factor of 1e+24.
Simple example
1 GW × 1e+24 = 1e+24 fW
1 gigawatt = 1e+24 femtowatts.
Real-world example
100 GW × 1e+24 = 1e+26 fW
100 gigawatts = 1e+26 femtowatts.
Conversion table
| Gigawatt (GW) | Femtowatt (fW) |
|---|---|
| 1 GW | 1e+24 fW |
| 10 GW | 1e+25 fW |
| 100 GW | 1e+26 fW |
| 500 GW | 5e+26 fW |
| 1,000 GW | 1e+27 fW |
| 5,000 GW | 5e+27 fW |
Reverse conversion: Femtowatt to Gigawatt
1e+24 fW × 1e-24 = 1 GW
1e+24 femtowatts = 1 gigawatts.
gigawatts = femtowatts × 1e-24
For a page dedicated to this direction, see Femtowatt to Gigawatt.
Understanding the Gigawatt (GW)
Gigawatt is 1000000000 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 gigawatt?
1 gigawatt equals 1e+24 femtowatts, using the exact defined conversion factor rather than an estimate.
How do I convert gigawatt to femtowatt?
Multiply the gigawatt value by 1e+24. The converter above does this instantly to whatever precision you set.
How do I convert femtowatt back to gigawatt?
Use the reverse factor: 1 femtowatt equals 1e-24 gigawatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a gigawatt?
Gigawatt (GW) is a unit of power.
What is a femtowatt?
Femtowatt (fW) is a unit of power.
Is the gigawatt to femtowatt conversion exact?
Yes. Both gigawatt and femtowatt are defined by fixed standards rather than physical artifacts, so the factor of 1e+24 used above is exact to as many digits as you choose to display.