Tool

Amperage Calculator From HP

Estimate motor current from horsepower, voltage, power factor, and efficiency.

HP Motor Current I = (HP x 746) / (V x PF x Eff) for 1-phase, divide by sqrt(3) for 3-phase

Motor Power

Motor mechanical output

Voltage

Line voltage for the motor circuit

Power Factor

Typical motor PF around 0.8 to 0.9

Efficiency

Typical motor efficiency 0.85 to 0.95

System Type

Select single-phase or three-phase motor