What does a dishwasher cost to run?

Run the numbers on your own use

Change any of these and the figures update. The defaults are the typical case described above; your rate is the input that moves the answer most.

Why this is lower than the number you will see elsewhere

Almost every published answer to this question multiplies the rating on the label by the hours the appliance is switched on. For a dishwasher that gives 720 kWh a year, or $132.

Most of a two-hour cycle is soaking and draining. The heater is on for a fraction of it.

The arithmetic, step by step

Nothing here is hidden, so you can check it or change it. Working in the order the formula runs:

1. 1,200 W — what it draws while it is actually drawing. This is the rating on the plate.
2. × 33% — the share of its in-service time it is really pulling that. Most of a two-hour cycle is soaking and draining. The heater is on for a fraction of it.
   That gives 396 W averaged across the hours it is on.
3. × 2 hours a day × 300 days — One normal cycle a day with heated dry on.
   396 × 2 × 300 ÷ 1,000 = 238 kWh a year.
4. + standby — 1 W for the other 22.0 hours a day, which is 6.6 kWh a year. People leave this out and it is not always small.
5. × 18.34¢ — the US average residential rate for June 2026.
   244 kWh × 18.34¢ = $45 a year.

Change any assumption in the calculator above and every figure on this page moves with it. The two that matter most are your rate, which varies 4× across the country, and the hours — the duty cycle is a property of the appliance, but the hours are a property of you.

How sensitive is that number?

A single figure invites more confidence than it deserves. Here is the same appliance under assumptions either side of the default, so you can see how much of the answer is the appliance and how much is the guess about how you use it.

Everything else held at the default. The spread here is the honest error bar on the headline figure.

What it costs per hour, day and month

At 18.34¢ per kWh, the US residential average for June 2026.

The thing worth knowing

Nearly all of a dishwasher’s electricity goes into heating water and then heating air to dry. The motor is almost free. Turning off heated dry and opening the door instead removes about a third of the cycle’s energy.

What it costs in your state

The appliance is the same everywhere; the rate is not. Running this dishwasher costs $129 a year in Hawaii and $32 in Nevada — a difference of 4×.

Cost of running one dishwasher for a year, by state. Residential average price, EIA June 2026.

Other kitchen costs

• Standalone ice maker

  $253 a year

  An undercounter unit kept switched on year round.

• Wine cellar cooling unit

  $239 a year

  A through-wall unit holding a small purpose-built cellar at 55°F.

• Garage refrigerator

  $130 a year

  An older second fridge in an unconditioned garage.

• Refrigerator

  $77 a year

  A modern 20 cu ft top-freezer, kitchen at normal room temperature.

• Kegerator

  $64 a year

  A single-tap unit kept at serving temperature year round.

• Chest freezer

  $63 a year

  A 15 cu ft chest freezer in a garage.

Questions

Source: U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A, June 2026. U.S. Government work, public domain.

How every figure on this page is computed · Where the data comes from