Watt to Horsepower Converter
Convert watts to horsepower instantly with a power calculator built for electrical work, engines, HVAC sizing, refrigeration, electronics, and engineering reference.
W to hp Calculator
Enter a power value and the conversion updates automatically.
Result updates automatically.
Formula: horsepower = watts × 0.0013410221
How to Convert Watt to Horsepower
Power conversion uses watts as the SI reference unit. Multiply the source power by the factor shown below to convert it into the selected output unit. This is useful for motor ratings, HVAC capacity, refrigeration tons, engine power, and electrical load estimates.
1 watt
0.0013410221 horsepower
10 watts
0.0134102209 horsepower
100 watts
0.134102209 horsepower
Power Formula Notes
The calculator converts through watts as the base power unit, then formats the result for the selected power unit.
Watts to HP Converter FAQ
Which power units are supported?
This tool supports watts, kilowatts, megawatts, horsepower, brake horsepower, BTU/hr, refrigeration tons, and milliwatts.
How do I convert W to hp?
Multiply the W value by 0.0013410221 to get hp. The calculator performs the formula automatically.
Can I reverse the power conversion?
Yes. Use the swap button to reverse the selected units and calculate the opposite direction.