kW to kVA calculator and back
kVA = kW ÷ 0.8, kW = kVA × 0.8. Enter either number and the other is calculated instantly.
100 kW = 125 kVA at cos φ 0.8
Table: kW and kVA
| kW | kVA | kVA | kW |
|---|---|---|---|
| 5 kW | 6.3 kVA | 5 kVA | 4 kW |
| 10 kW | 12.5 kVA | 10 kVA | 8 kW |
| 15 kW | 18.8 kVA | 15 kVA | 12 kW |
| 20 kW | 25 kVA | 20 kVA | 16 kW |
| 30 kW | 37.5 kVA | 30 kVA | 24 kW |
| 40 kW | 50 kVA | 40 kVA | 32 kW |
| 50 kW | 62.5 kVA | 50 kVA | 40 kW |
| 60 kW | 75 kVA | 60 kVA | 48 kW |
| 80 kW | 100 kVA | 80 kVA | 64 kW |
| 100 kW | 125 kVA | 100 kVA | 80 kW |
| 120 kW | 150 kVA | 120 kVA | 96 kW |
| 150 kW | 187.5 kVA | 150 kVA | 120 kW |
| 200 kW | 250 kVA | 200 kVA | 160 kW |
| 250 kW | 312.5 kVA | 250 kVA | 200 kW |
| 300 kW | 375 kVA | 300 kVA | 240 kW |
| 400 kW | 500 kVA | 400 kVA | 320 kW |
| 500 kW | 625 kVA | 500 kVA | 400 kW |
| 600 kW | 750 kVA | 600 kVA | 480 kW |
| 800 kW | 1000 kVA | 800 kVA | 640 kW |
| 1000 kW | 1250 kVA | 1000 kVA | 800 kW |
At cos φ 0.8, as for diesel generators. More in the article kW and kVA: what is the difference.
Generators by power
8 kW / 10 kVA10 kW / 12.5 kVA20 kW / 25 kVA30 kW / 37 kVA50 kW / 62 kVA60 kW / 75 kVA100 kW / 125 kVA120 kW / 150 kVA150 kW / 187 kVA200 kW / 250 kVA250 kW / 312 kVA300 kW / 375 kVA350 kW / 437 kVA400 kW / 500 kVA450 kW / 520 kVA500 kW / 625 kVA600 kW / 750 kVA700 kW / 875 kVA800 kW / 1000 kVA900 kW / 1125 kVA1000 kW / 1275 kVA
Questions and answers
How to convert kW to kVA?
Divide kW by the power factor. For generators it is usually 0.8: kVA = kW ÷ 0.8. For example, 100 kW ÷ 0.8 = 125 kVA.
How to convert kVA to kW?
Multiply kVA by the power factor 0.8: kW = kVA × 0.8. For example, 125 kVA × 0.8 = 100 kW.
How many kVA is 100 kW?
125 kVA at a power factor of 0.8.
How many kW is 1000 kVA?
800 kW at a power factor of 0.8.
Why does a generator have two power ratings?
kW is active power, which actually runs the equipment; kVA is apparent power, which the alternator is rated for. They are related by the power factor cos φ.
How to calculate power from current?
For three-phase 400 V: kVA = √3 × 0.4 × current in amperes, kW = kVA × 0.8. For single-phase 230 V: kVA = 0.23 × current.
Need to size a generator for your equipment? Power calculator takes starting currents and margin into account.