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ElecToolsHQ

Motor HP to Amps Calculator

Convert motor horsepower to current from voltage and power factor (A = (HP × 746) ÷ (V × PF)).

Formula

A = (HP × 746) ÷ (V × PF)

A
Current, in amps
HP
Motor power, in horsepower
V
Voltage, in volts
PF
Power factor, between 0 and 1

What this calculator does

Quickly estimates a motor's current draw from its horsepower, voltage, and power factor, without requiring an efficiency value.

Use cases

  • Get a quick current estimate when motor efficiency isn't available
  • Compare a nameplate HP rating against an estimated current draw
  • Cross-check the Motor Full Load Current Calculator's result

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