Motor Full-Load Current

Calculate the full-load current of an electric motor from its power, voltage, efficiency and power factor, free online.

Motor power

Unit

Voltage (V)

Supply

Efficiency (%)

Power factor

About this calculator

Three-phase: I = P ÷ (√3 · V · η · pf). Single-phase: I = P ÷ (V · η · pf). Conductors are sized for 125% of the full-load current, and the motor overload relay is typically set at 105–115% of the nameplate current.