Estimate motor horsepower from amps, volts, watts, kilowatts, torque, RPM, phase type, efficiency, and power factor. This calculator also estimates input power, output power, full-load amps, torque, kVA, and motor load values.
Electrical input:
The calculator estimates input watts from volts, amps, phase type, and power factor.
Motor output:
Efficiency is applied to estimate output watts, then output watts are converted to horsepower.
Mechanical input:
Torque and RPM can also be used to estimate mechanical horsepower directly.
A motor horsepower calculator helps estimate motor size from electrical readings or mechanical torque and speed.
It can help with pumps, fans, compressors, conveyors, shop tools, HVAC motors, replacement planning, and general motor load estimates.
Your result shows estimated horsepower, output watts, output kilowatts, input watts, input kilowatts, estimated amps, torque estimate, kVA, efficiency, power factor, and comparison motor estimates.
Estimate output watts, then divide by 746. Output watts can be found from electrical input watts multiplied by motor efficiency.
One horsepower is about 746 watts.
Yes. For torque in pound-feet, multiply torque by RPM, then divide by 5,252.
For real equipment decisions, use the motor nameplate and manufacturer data. Calculated horsepower is useful for planning and estimating.