Tool

Amperage Calculator 3 Phase Motor

Estimate three-phase motor full-load current from horsepower, voltage, PF, and efficiency.

3-Phase Motor I = (HP x 746) / (sqrt(3) x V x PF x Eff)

Motor Power

Motor mechanical output

Line Voltage

Motor line-to-line voltage

Power Factor

Typical motor PF around 0.8 to 0.9

Efficiency

Typical motor efficiency 0.85 to 0.95

System Type

Set to three-phase for this calculator