Calculate power factor from kW and kVA, watts and volt-amps, volts and amps, or phase angle. This calculator also estimates apparent power, reactive power, phase angle, kVAR, and power factor correction.
Power factor:
The calculator divides real power by apparent power to estimate power factor.
Reactive power:
It estimates kVAR using the power triangle relationship between kW, kVA, and kVAR.
Correction estimate:
The calculator estimates how much kVAR correction may be needed to reach a target power factor.
A power factor calculator helps estimate how efficiently AC electrical power is being used by motors, transformers, HVAC equipment, lighting, and industrial loads.
It can help with kW, kVA, kVAR, phase angle, power factor correction planning, capacitor bank estimates, and electrical load analysis.
Your result shows power factor, kW, kVA, kVAR, phase angle, apparent current, correction kVAR, corrected kVA, estimated capacitor size, and comparison load power factors.
Divide real power by apparent power. For example, 8 kW divided by 10 kVA gives a power factor of 0.80.
A power factor close to 1.00 is generally better. Many facilities target around 0.95 or higher, but the best target depends on the utility and equipment.
Inductive loads such as motors, transformers, compressors, ballasts, and some industrial equipment can lower power factor.
No. This calculator gives a simplified estimate. Power factor correction requires review of harmonics, switching, utility rules, equipment ratings, capacitor placement, and electrical code.