kVA to kW Calculator
Find real kilowatts from apparent kVA: kW = kVA × PF. Default 10 kVA at PF 0.85 gives 8.5 kW. Informational only.
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How to convert kVA to kW
- Enter apparent power in kVA.
- Enter power factor. Default 0.85 is an example motor-like value.
- Read real power in kW.
- For generator sizing you still need local rules. Nothing is uploaded.
kVA to kW
kW = kVA × PF
| Apparent | kVA from nameplate or meter |
|---|---|
| Real | kW after PF correction |
| Power factor | Must be between 0 and 1 |
| Default | 10 kVA × 0.85 = 8.5 kW |
| Inverse | kVA = kW / PF on the kW to kVA page |
| Approval | Informational. Not a tariff. |
Multiply by PF
Real power is apparent power times power factor when the angle is modeled as a single PF number. 10 kVA × 0.85 = 8.5 kW.
Reading nameplates
Motor and transformer plates may list kVA and PF separately. Type those figures here for a quick kW estimate.
From amps to kVA
If you have line current, amps to kVA finds kVA first, then return here with that kVA if you need kW.
Watts output
kVA to watts multiplies by 1000 when you need watts instead of kilowatts.
Limits
Single PF snapshot.
The formula runs in this tab. CZNull does not receive the numbers.
Informational only. Not wiring, code, or manufacturer approval. See the disclaimer.
What kW is 10 kVA at PF 0.85?
8.5 kW. Multiply 10 by 0.85.
Why is PF 0.85 the default?
It is a common teaching example for motor-like loads, not a universal constant.
Can I use PF 1?
Yes. Unity PF makes kW equal kVA, as on a resistive heater modeled ideally.
Does this page need line voltage?
No. Voltage is used on kVA-to-amps and amps-to-kVA pages.
How do I go from kW back to kVA?
Divide kW by PF on kW to kVA.