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ElecToolsHQ

Single Phase Power Calculator

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

Formula

P = V × I × PF

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

What this calculator does

Calculates real power delivered by a single-phase circuit from voltage, current, and power factor.

Use cases

  • Find the power draw of a single-phase appliance or motor
  • Size a single-phase circuit for a known load
  • Verify a measured single-phase power reading against the expected calculation

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