Skip to main content
ElecToolsHQ

Real Power Calculator

Calculate real (true) 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 (the power that does useful work) from voltage, current, and power factor.

Use cases

  • Find the actual useful power delivered to a motor or load
  • Compare nameplate power factor against a measured real power
  • Estimate billed energy usage from voltage, current, and power factor

Related