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ElecToolsHQ

Single Phase Current Calculator

Calculate single-phase current from power, voltage, and power factor (I = P ÷ (V × PF)).

Formula

I = P ÷ (V × PF)

I
Current, in amps
P
Real power, in watts
V
Voltage, in volts
PF
Power factor, between 0 and 1

What this calculator does

Calculates the current drawn by a single-phase load from its power rating, voltage, and power factor.

Use cases

  • Size conductors or a breaker for a single-phase load's power rating
  • Estimate full-load current for a single-phase motor or appliance
  • Cross-check a nameplate current rating against a calculated value

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