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kVA to kW Calculator
Convert apparent power (kVA) to real power (kW) using the power factor. Also calculates reactive power (kVAR). Essential for generator and UPS sizing.
kVA vs kW
kVA is apparent power (the total power the system must handle), while kW is real power (the useful work done). The difference is the power factor: kW = kVA × PF.
Generators and UPS systems are rated in kVA because they must handle the total current regardless of power factor. HVAC equipment draws real power in kW.
Frequently Asked Questions
What is the difference between kVA and kW?
kVA is apparent power (voltage × current), while kW is real power (useful work). kW = kVA × power factor. A 25 kVA generator at 0.85 PF delivers 21.25 kW.
What power factor should I use?
For HVAC equipment, 0.8–0.9 is typical. Pure resistive loads (heaters) have PF = 1.0. Motors and inverter drives may have PF of 0.7–0.95. Check the equipment nameplate.
kVA to kW Calculator
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