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Power Factor Calculator
Calculate power factor from kW and kVA. Convert between apparent power (VA), real power (W), and reactive power (VAR).
Enter any 2 of the 4 values — the rest will be calculated automatically.
Volts
Amps
Ohms Ω
Watts
Voltage
12 V
Current
2 A
Resistance
6 Ω
Power
24 W
Ohm's Law: V = I × R | P = V × I | P = I² × R | P = V² / R
How to Use the Power Factor Calculator
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
What is power factor?
Power factor = Real Power / Apparent Power. A PF of 1.0 is ideal (purely resistive). Motor loads often have PF of 0.7–0.9.