kVA to kW Calculator
Convert kVA to kW and back using power factor for generators and transformers with this free electrical calculator in your browser.
Enter Values
Minimum 0
Range 0–1
How to use this calculator
- Enter the kVA and the power factor.
- Read the real power in kW.
How it works
kW = kVA × power factor.
Worked example
10 kVA at 0.8 PF. = 8 kW.
Common mistakes
- Assuming kVA equals kW — only true at a power factor of 1.
- Using a power factor above 1 (it can't exceed 1).
Frequently asked questions
How do I convert kVA to kW?
kW = kVA × power factor. At a power factor of 0.8, a 100 kVA supply delivers 80 kW of real power.
What is the difference between kVA and kW?
kVA is apparent power, what the supply must carry; kW is real power that does work. The gap between them is reactive power.
Why are generators rated in kVA?
kVA is the apparent power the alternator must supply; the useful work done is kW, which depends on the load's power factor.
Related tools
- Power Factor Calculator
- Three Phase Power Calculator
- Reactive Power (kVAR) Calculator
- Single Phase Power Calculator
- Amps to Watts Calculator
- Watt-hours to Amp-hours Calculator
Explore more in Electrical, Electronics, Solar & Energy.
Cite this tool
Zerdly. (2026). kVA to kW Calculator. Retrieved from https://www.zerdly.com/tools/kva-to-kw-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.