Horsepower Calculator

Convert between mechanical, metric, and electrical horsepower, watts, and kilowatts. Calculate horsepower from torque and RPM.

Mode

Equivalents
100 HP (mech)
74.57 kW  ·  74,569.99 W

Conversion Table

UnitValue
HP – Mechanical100
HP – Metric (PS)101.387
HP – Electrical99.9598
Kilowatts (kW)74.57
Watts (W)74,569.99
ft·lbf/s55,000
BTU/hr254,443.24

HP Reference

TypeWattsDefinition
Mechanical HP745.70 W550 ft·lbf/s
Metric HP (PS)735.50 W75 kgf·m/s
Electrical HP746 WExact by definition