Dishwasher costs about $3.56 a month ($42.75 a year) at the U.S. average of 18.19¢/kWh, using 235 kWh a year (rated).
At 18.19¢/kWh — U.S. average, Jan–Aug 2026 (EIA).
| Period | kWh | Cost |
|---|---|---|
| Per hour (avg) | 0.027 | $0.005 |
| Per day | 0.64 | $0.12 |
| Per month | 19.6 | $3.56 |
| Per year | 235 | $42.75 |
| Where | ¢/kWh | Month | Year |
|---|---|---|---|
| U.S. | 18.19 | $3.56 | $42.75 |
| North Dakota (cheapest) | 12.46 | $2.44 | $29.28 |
| Hawaii (most expensive) | 46.41 | $9.09 | $109 |
| State | ¢/kWh | Per month | Per year |
|---|---|---|---|
| Hawaii | 46.41 | $9.09 | $109 |
| California | 32.58 | $6.38 | $76.56 |
| Maine | 30.23 | $5.92 | $71.04 |
| Massachusetts | 30.19 | $5.91 | $70.95 |
| U.S. average | 18.19 | $3.56 | $42.75 |
| Utah | 13.19 | $2.58 | $31.00 |
| Idaho | 13.02 | $2.55 | $30.60 |
| Nebraska | 12.92 | $2.53 | $30.36 |
| North Dakota | 12.46 | $2.44 | $29.28 |
Rated appliances list annual energy (kWh/yr) measured on a federal test. Yearly cost = 235 kWh × 18.19¢ = $42.75. The EnergyGuide label's own dollar figure assumes 14¢/kWh, so it reads $32.90 — below today's average price.
Prices are EIA's average residential price for Jan–Aug 2026. Pick your state in the calculator for your local figure.
The full method, material data and tips are on the main electricity cost calculator page.