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ElecToolsHQ

Single Phase Voltage Calculator

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

Formula

V = P ÷ (I × PF)

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

What this calculator does

Calculates the voltage of a single-phase circuit from power, current, and power factor.

Use cases

  • Back-calculate expected supply voltage for a known single-phase load
  • Verify a measured voltage against a load's power and current rating
  • Troubleshoot a single-phase circuit by comparing expected vs. measured voltage

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