kVA to kW Converter
Convert apparent power (kVA) to real power (kW) or back, using the power factor of the load.
How to use the kVA to kW Converter
- Choose kVA → kW or kW → kVA.
- Enter the value.
- Enter the power factor (0.8 is typical for generators).
How it works
kW = kVA × power factor. kVA is apparent power (volts × amps); kW is the real power that does useful work. Inductive loads like motors draw extra reactive power (kVAR), so the power factor is below 1. Generators are commonly rated at a power factor of 0.8, which is why a 100 kVA generator is sold as an 80 kW unit.
kVA to kW at PF 0.8
| kVA | kW |
|---|---|
| 10 | 8 |
| 20 | 16 |
| 30 | 24 |
| 50 | 40 |
| 75 | 60 |
| 100 | 80 |
| 150 | 120 |
| 250 | 200 |
| 500 | 400 |
Frequently asked questions
Is kVA the same as kW?
Only when the power factor is 1 (purely resistive loads).
How many kW is 100 kVA?
80 kW at a power factor of 0.8.
What is power factor?
The ratio of real power to apparent power, between 0 and 1.
Why are UPS and generators rated in kVA?
Their limits depend on current and voltage regardless of load type, which kVA describes.
What size generator do I need in kVA?
Add up the running watts of your loads, divide by the power factor (0.8 for most generators) and add 20–25% margin: a 16 kW load needs about a 25 kVA generator.