Convert watt to horsepower
Here you can quickly calculate how many horsepower fit in one watt.
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- scroll: formula · table · questions -
- 1 W = 0.001341 hp
- 1 hp = 745.699872 W
Conversion from watt to horsepower example
- 1 watt = 0.001341 horsepower
Watt to horsepower conversion table
| watt | horsepower |
|---|---|
| 1 | 0.001341 |
| 2 | 0.002682 |
| 5 | 0.006705 |
| 10 | 0.01341 |
| 20 | 0.02682 |
| 50 | 0.067051 |
| 100 | 0.134102 |
Formula to convert watt to horsepower
To convert watt to horsepower, multiply by 0.001341.
1 W = 0.001341 hp
Example: 1 watt = 0.001341 horsepower
Common mistakes in power conversion
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Horsepower comes in flavours: the metric horsepower is about 735.5 W while the mechanical (imperial/US) horsepower is about 745.7 W, roughly 1.4% stronger. The same engine therefore shows a slightly lower number in hp than in European hk/PS figures. Always state which horsepower you mean.
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'Kilowatts per hour' is a common slip of the tongue, power is measured in plain kilowatts. The kilowatt-hour (kWh) is energy: power multiplied by time. A machine draws 3 kW, and uses 3 kWh in one hour.
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American air conditioners are rated in BTU/h, European ones in watts, 1 kW is about 3,412 BTU/h. A '9,000 BTU' unit is therefore about 2.6 kW. Divide BTU/h by 3,412 to get kilowatts.
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'Calories burned per hour' is a power figure, not an amount of energy: 1 kcal/h is about 1.16 W. A run that burns 600 kcal in an hour corresponds to an average output of about 700 W.
Quick watt to/from horsepower conversion quiz
Score:
0
148 watt equals 0.0992 horsepower.
Correct answer: 148 watt = 0.198 horsepower.
240 watt equals 0.322 horsepower.
Correct answer: 240 watt = 0.322 horsepower.
5.8 horsepower equals 2.16e+3 watt.
Correct answer: 5.8 horsepower = 4.33e+3 watt.
170 watt equals 0.228 horsepower.
Correct answer: 170 watt = 0.228 horsepower.