kVA to kW Calculator
Fill in the values and the answer updates as you type.
How the kVA to kW Calculator works
kW = kVA × power factor. Current = kVA × 1000 ÷ voltage for single-phase, or ÷ (√3 × voltage) for three-phase using line-to-line voltage. Generators are commonly rated at a power factor of 0.8. Example: with the default values, real power comes to 40 kW.
Inputs and results
The kVA to kW Calculator takes 4 inputs and gives 3 results.
What you enter
- Apparent power (kVA) — starts at 50.
- Power factor — starts at 0.8.
- Supply type — starts at Three-phase. Choose from: Single-phase and Three-phase.
- Voltage (V) — starts at 400.
What you get
- Real power (kW)
- Reactive power (kVAR)
- Line current (A)
Example: kVA to kW Calculator with the starting values
With apparent power 50 kVA, power factor 0.8, supply type Three-phase and voltage 400 V, the calculator returns:
| Real power (kW) | 40 |
|---|---|
| Reactive power (kVAR) | 30 |
| Line current (A) | 72.2 |
Change any value above and the results update straight away.
kVA to kW Calculator FAQ
How do I use the kVA to kW Calculator?
Enter apparent power, power factor, supply type and voltage in the fields, then read real power (kw), reactive power (kvar) and line current (a) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the kVA to kW Calculator calculate?
Convert kVA to kW and current for single or three-phase supplies. It returns real power (kw), reactive power (kvar) and line current (a) from the 4 values you provide.
What values does the kVA to kW Calculator start with?
It opens with apparent power 50 kVA, power factor 0.8, supply type Three-phase and voltage 400 V so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the kVA to kW Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the kVA to kW Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.