Enter values
Formula and methodology
kWh = power in kW × hours per day × days. Optional estimated cost equals kWh × the rate you enter.
How to use the result
Check that each input uses the intended unit, then compare the displayed result with the assumptions above. Recalculate when the source values or operating conditions change. Do not use an estimate as a substitute for equipment documentation or professional review where safety depends on the result.
Reviewed sources
- Department of Energy Style Guide: kilowatt and kilowatt-hour — U.S. Department of Energy; reviewed September 1, 2026.
Method reviewed September 1, 2026. Scheduled review by 2028-08-31.