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ElecToolsHQ

Motor Full Load Current Calculator

Calculate a motor's full load current from horsepower, voltage, efficiency, and power factor (FLC = (HP × 746) ÷ (V × Eff × PF)).

Formula

FLC = (HP × 746) ÷ (V × Eff × PF)

FLC
Full load current, in amps
HP
Motor power, in horsepower
V
Voltage, in volts
Eff
Motor efficiency, between 0 and 1
PF
Power factor, between 0 and 1

What this calculator does

Calculates the current a motor draws while running at its rated horsepower, voltage, efficiency, and power factor.

Use cases

  • Size conductors and overload protection for a motor circuit
  • Check a motor's expected running current against a measured reading
  • Compare full load current across motors with different efficiency ratings

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