kVA to kW Calculator

Convert kVA to kW with power factor—instant real power from nameplate apparent power for UPS, transformers, and generators.

Formula: kW = kVA × PF. Example: 1 kVA × 0.8 = 0.8 kW. Need the reverse? Use kW to kVA.

Calculator

Enter apparent power and PF. Result updates instantly: kW = kVA × PF.

Apparent power (kVA) Example: 100 kVA transformer or UPS nameplate.

Power factor (PF) Motors/UPS often 0.80–0.95; resistive ≈ 1.0.

About this calculator

This kVA to kW calculator converts apparent power to real power with kW = kVA × PF. It is the reverse of kW to kVA. After you have kW, continue to current tools or browse the power calculator hub.

Calculation Results

≈ 80 kW real power

100 kVA · PF 0.8 · ≈ 60 kVAR reactive

Formula: kW = kVA × PF

Estimate from nameplate kVA and assumed PF. Harmonics, continuous-load margins, and OEM derates are not applied.

Continue Your Calculation

Have real kW from kVA × PF? Continue to amps screening (link updates from your result).

Amps to kW →

kVA to kW quick chart (common PF)

kW = kVA × PF. Click a row to load the calculator.

PF 0.8	PF 0.85	PF 1.0
0.80 kW	0.85 kW	1.00 kW
4.00 kW	4.25 kW	5.00 kW
16.0 kW	17.0 kW	20.0 kW
80 kW	85 kW	100 kW
400 kW*	425 kW*	500 kW

*500 kVA row preset uses PF 0.9 (450 kW). PF 0.8/0.85 columns shown for reference.

kVA to kW formula

kW = kVA × PF · kVA = kW ÷ PF (reverse on kW to kVA)

kVA — apparent power (nameplate / transformer rating)
kW — real (active) power delivered to the load
PF — power factor (0–1); cos φ for sinusoidal systems

Example: 100 kVA × 0.8 = 80 kW. Reactive ≈ √(100² − 80²) = 60 kVAR.

Definitions: kVA vs kW. Derivation & worked examples: kW to kVA formula.

When to use which tool

Goal	Tool
Convert kVA → kW with PF	This page
Convert kW → kVA with PF	kW to kVA
Convert kVA → line amps	kVA to Amps
Convert amps ↔ kW	Amps to kW
Power triangle / kVAR	kW to kVAR

Frequently Asked Questions

How do I convert kVA to kW?

Use kW = kVA × PF. Example: 100 kVA × 0.8 = 80 kW.

How many kW is 1 kVA?

At PF 1.0 → 1 kW. At PF 0.8 → 0.8 kW. At PF 0.85 → 0.85 kW. Use the 1 kVA preset above.

What is 20 kVA in kW?

At PF 0.8 → 16 kW. At PF 0.85 → 17 kW. At PF 1.0 → 20 kW.

Is kVA the same as kW?

No. They match only when PF = 1.0. Otherwise kW < kVA for lagging loads.

Do I need power factor to convert kVA to kW?

Yes. Without PF you cannot get real power from apparent power.

How is this different from kW to kVA?

This page is kVA → kW. Reverse conversion is on kW to kVA (kVA = kW ÷ PF).