kVA to kW Calculator
Convert kVA to kW, or kW to kVA, using the power factor. kVA is apparent power and kW is real (working) power; the two are linked by kW = kVA × power factor. Common for sizing generators, transformers, and UPS systems.
kW = kVA × power factor. Use PF ≈ 1.0 for resistive loads (heaters), and 0.8 is a common default for motors and mixed loads: check the nameplate.
Real power
8 kW
- Apparent power
- 10 kVA
- Real power
- 8 kW
- Power factor
- 0.80
kVA to kW conversion table
kW = kVA × power factor. Each rating below is shown at four power factors: 1.0 for purely resistive loads, 0.95 and 0.9 for typical modern equipment, and 0.8, the power factor generators are rated at. The amps columns are full-load current, which depends only on kVA and voltage, not on the power factor.
| kVA | kWPF 1.00 | kWPF 0.95 | kWPF 0.90 | kWPF 0.80 | Amps240 V 1-phase | Amps480 V 3-phase |
|---|---|---|---|---|---|---|
| 1 kVA | 1 | 0.95 | 0.9 | 0.8 | 4.2 | 1.2 |
| 2 kVA | 2 | 1.9 | 1.8 | 1.6 | 8.3 | 2.4 |
| 3 kVA | 3 | 2.85 | 2.7 | 2.4 | 12.5 | 3.6 |
| 5 kVA | 5 | 4.75 | 4.5 | 4 | 20.8 | 6 |
| 7.5 kVA | 7.5 | 7.13 | 6.75 | 6 | 31.3 | 9 |
| 10 kVA | 10 | 9.5 | 9 | 8 | 41.7 | 12 |
| 15 kVA | 15 | 14.25 | 13.5 | 12 | 62.5 | 18 |
| 20 kVA | 20 | 19 | 18 | 16 | 83.3 | 24.1 |
| 25 kVA | 25 | 23.75 | 22.5 | 20 | 104.2 | 30.1 |
| 30 kVA | 30 | 28.5 | 27 | 24 | 125 | 36.1 |
| 37.5 kVA | 37.5 | 35.63 | 33.75 | 30 | 156.3 | 45.1 |
| 45 kVA | 45 | 42.75 | 40.5 | 36 | 187.5 | 54.1 |
| 50 kVA | 50 | 47.5 | 45 | 40 | 208.3 | 60.1 |
| 75 kVA | 75 | 71.25 | 67.5 | 60 | 312.5 | 90.2 |
| 100 kVA | 100 | 95 | 90 | 80 | 416.7 | 120.3 |
| 112.5 kVA | 112.5 | 106.88 | 101.25 | 90 | 468.8 | 135.3 |
| 150 kVA | 150 | 142.5 | 135 | 120 | 625 | 180.4 |
| 167 kVA | 167 | 158.65 | 150.3 | 133.6 | 695.8 | 200.9 |
| 225 kVA | 225 | 213.75 | 202.5 | 180 | 937.5 | 270.6 |
| 300 kVA | 300 | 285 | 270 | 240 | 1,250 | 360.8 |
| 500 kVA | 500 | 475 | 450 | 400 | 2,083.3 | 601.4 |
| 750 kVA | 750 | 712.5 | 675 | 600 | 3,125 | 902.1 |
| 1,000 kVA | 1,000 | 950 | 900 | 800 | 4,166.7 | 1,202.8 |
A transformer’s kVA rating is a current and heat limit, so it can only deliver its full kVA as kW into a load at a power factor of 1.0. Amps are I = kVA × 1,000 ÷ V for single-phase and ÷ (√3 × V) for three-phase; the kVA to amps converter handles other voltages. Have kW and need the kVA rating? kW to kVA.
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Sources & standards
This tool's methodology and data follow US standards and authoritative public datasets: