This watt-hours (kwh) reference table shows the energy used for a range of power values, assuming a time used of 5 hours. Every figure is computed with the same engine that powers our Watt-Hours (kWh) Calculator, so the numbers are exact.
| Power | Energy used | In watt-hours |
|---|---|---|
| 15 W | 0.0750 | 75.0 |
| 30 W | 0.1500 | 150.0 |
| 45 W | 0.2250 | 225.0 |
| 60 W | 0.3000 | 300.0 |
| 90 W | 0.4500 | 450.0 |
| 120 W | 0.6000 | 600.0 |
| 180 W | 0.9000 | 900.0 |
| 300 W | 1.5000 | 1,500.0 |
| 420 W | 2.1000 | 2,100.0 |
| 600 W | 3.0000 | 3,000.0 |
How to use this table
Find the row closest to your power and read across to the energy used. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Watt-Hours (kWh) Calculator for a precise answer.
Need a value that is not in the table? — the Watt-Hours (kWh) Calculator does it instantly, for free, with the formula and a worked example built in.
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