Power rate using BTU per hour.
BTU per hour to Femtowatts Converter — BTU/h to fW
Convert BTU per hour (BTU/h) to Femtowatt (fW) using the exact conversion factor (1 btu per hour = 2.930711e+14 femtowatt). See the formula, worked examples, and conversion table.
BTU per hour 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 0.2930710702 / 1e-15.
Power uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting BTU per hour to Femtowatts
BTU per hour 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: Power rate using BTU per hour, and femtowatt is 1e-15 watt units.
Formula
femtowatts = btu per hour × 2.930711e+14
This factor comes from each unit's defined relationship to the category's base unit: 1 btu per hour equals 0.293071070172 base units, and 1 femtowatt equals 1e-15 base units, so dividing one by the other gives the direct btu per hour-to-femtowatt factor of 2.930711e+14.
Simple example
1 BTU/h × 2.930711e+14 = 2.930711e+14 fW
1 btu per hour = 2.930711e+14 femtowatts.
Real-world example
100 BTU/h × 2.930711e+14 = 2.930711e+16 fW
100 btu per hour = 2.930711e+16 femtowatts.
Conversion table
| BTU per hour (BTU/h) | Femtowatt (fW) |
|---|---|
| 1 BTU/h | 2.930711e+14 fW |
| 10 BTU/h | 2.930711e+15 fW |
| 100 BTU/h | 2.930711e+16 fW |
| 500 BTU/h | 1.465355e+17 fW |
| 1,000 BTU/h | 2.930711e+17 fW |
| 5,000 BTU/h | 1.465355e+18 fW |
Reverse conversion: Femtowatt to BTU per hour
2.930711e+14 fW × 3.412142e-15 = 1.000000102 BTU/h
2.930711e+14 femtowatts = 1.000000102 btu per hour.
btu per hour = femtowatts × 3.412142e-15
For a page dedicated to this direction, see Femtowatt to BTU per hour.
Understanding the BTU per hour (BTU/h)
Power rate using BTU per hour.
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 btu per hour?
1 btu per hour equals 2.930711e+14 femtowatts, using the exact defined conversion factor rather than an estimate.
How do I convert btu per hour to femtowatt?
Multiply the btu per hour value by 2.930711e+14. The converter above does this instantly to whatever precision you set.
How do I convert femtowatt back to btu per hour?
Use the reverse factor: 1 femtowatt equals 3.412142e-15 btu per hour. You can also use the swap control in the converter above to flip the direction instantly.
What is a btu per hour?
BTU per hour (BTU/h) is a unit of power.
What is a femtowatt?
Femtowatt (fW) is a unit of power.
Is the btu per hour to femtowatt conversion exact?
Yes. Both btu per hour and femtowatt are defined by fixed standards rather than physical artifacts, so the factor of 2.930711e+14 used above is exact to as many digits as you choose to display.