kVA to kW Calculator
Convert between apparent power (kVA) and real power (kW) with power factor — in both directions — and see the amps at any voltage.
0.8 is standard for generators and mixed motor loads; 1.0 for resistive loads.
Real power
0 kW
kW = kVA × PF
Planning estimates only — check equipment nameplates and consult an electrician or engineer for installations.
kVA, kW, and power factor
kW = kVA × PF, and kVA = kW ÷ PF. Real power (kW) does the work; apparent power (kVA) is the total current-voltage product the equipment must carry; the difference is reactive power (kVAR) that motors and transformers exchange with the grid without doing useful work.
Common generator ratings at PF 0.8:
| kVA | kW @ PF 0.8 | Amps @ 230 V 1-φ | Amps @ 400 V 3-φ |
|---|---|---|---|
| 10 kVA | 8 kW | 43 A | 14 A |
| 20 kVA | 16 kW | 87 A | 29 A |
| 50 kVA | 40 kW | 217 A | 72 A |
| 100 kVA | 80 kW | 435 A | 144 A |
| 200 kVA | 160 kW | — | 289 A |
| 500 kVA | 400 kW | — | 722 A |
kVA to kW FAQ
How do I convert kVA to kW?
kW = kVA × power factor. A 100 kVA generator at PF 0.8 delivers 80 kW. Reverse: kVA = kW ÷ PF.
What is the difference between kVA and kW?
kW is real power that does work; kVA is apparent power — total volt-amps including the reactive component. Power factor is the ratio between them.
Why are generators rated in kVA?
Generator windings are limited by current, not real power, and the load's power factor isn't known in advance — so machines are rated in kVA, with kW ratings usually quoted at PF 0.8.
What power factor should I assume?
0.8 for mixed/motor loads (the generator-industry standard), 1.0 for resistive loads, 0.85–0.95 for modern buildings with lots of electronics.