This generator size reference table shows the generator size needed for a range of total running watts values, assuming an additional starting (surge) watts of 1,500 W. Every figure is computed with the same engine that powers our Generator Size Calculator, so the numbers are exact.
| Total running watts | Generator size needed | Approx. kVA (PF 0.8) |
|---|---|---|
| 750 W | 2,250 | 2.81 |
| 1,500 W | 3,000 | 3.75 |
| 2,300 W | 3,800 | 4.75 |
| 3,000 W | 4,500 | 5.63 |
| 4,500 W | 6,000 | 7.50 |
| 6,000 W | 7,500 | 9.38 |
| 9,000 W | 10,500 | 13.13 |
| 15,000 W | 16,500 | 20.63 |
| 21,000 W | 22,500 | 28.13 |
| 30,000 W | 31,500 | 39.38 |
How to use this table
Find the row closest to your total running watts and read across to the generator size needed. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Generator Size Calculator for a precise answer.
Need a value that is not in the table? — the Generator Size Calculator does it instantly, for free, with the formula and a worked example built in.
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