kW to HP Calculator
Convert kilowatts to horsepower — or horsepower back to kW. WattSimple shows all three horsepower standards at once (mechanical, electrical, and metric PS), because they are not the same number, plus the input power and current a motor actually draws once you account for its efficiency.
Horsepower here is shaft (output) power. The supply draw is higher because of motor losses, which is why the input kW and amps below exceed the straight conversion. For a real motor circuit, size from the NEC 430.250 full-load-current tables and the nameplate — not from this estimate. Verify with a licensed electrician and your local AHJ.
Horsepower
100.58 HP
- Mechanical HP
- 100.58 hp
- Electrical HP
- 100.54 hp
- Metric HP (PS)
- 101.97 PS
- Shaft output
- 75 kW
- Input power drawn
- 83.33 kW
- Approx. current @ 480V 3ø
- 117.9 A
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This tool's methodology and data follow US standards and authoritative public datasets: