Dishwashers consume 1,800–2,400 watts during active wash and dry cycles, typically running 1.5–3 hours per load. The bulk of energy goes to water heating, so tank temperature and load frequency matter as much as the machine itself.
| Basis | Cost |
|---|---|
| Per hour (while running, 1200 W typical) | $0.23 |
| Per day (1 h/day, 5/7 days) | $0.16 |
| Per month | $4.91 |
| Per year | $58.95 |
| Hourly range (small 900 W – large 1500 W) | $0.17 – $0.28 |
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