How Much Does a Dishwasher Cost Per Cycle? Electricity + Water Cost Calculator
A dishwasher uses electricity and water every time you run it, but the cost of one load is almost impossible to see on a monthly utility bill.
That makes a simple question harder than it sounds:
How much does it actually cost to run a dishwasher once?
The answer depends on four numbers:
- Your dishwasher's annual electricity use
- Your electricity rate
- Its water use per cycle
- Your combined water and sewer rate
The calculator below turns those numbers into an estimated cost per cycle, monthly cost and annual operating cost.
Quick Answer: How Much Does a Dishwasher Cost Per Cycle?
A useful benchmark is the current ENERGY STAR requirement for a standard-size residential dishwasher.
Under ENERGY STAR Version 7.0, a standard-size certified dishwasher must use no more than:
- 240 kWh per year
- 3.2 gallons of water per cycle
The standardized annual-energy calculation uses 215 dishwasher cycles per year.
Dividing 240 kWh by 215 cycles gives an approximate benchmark of:
=
about 1.12 kWh per cycle
At the June 2026 U.S. average residential electricity price of 18.34¢/kWh, that works out to approximately:
$0.20 of electricity per cycle.
If the dishwasher also uses 3.2 gallons per cycle and your combined water and sewer rate is $15 per 1,000 gallons, water and sewer add roughly:
$0.05 per cycle.
Under those assumptions, one load costs approximately:
That's an illustrative benchmark, not a universal dishwasher cost.
Dishwasher Cost Per Cycle Calculator
Use your own utility rates and dishwasher specifications for a more useful estimate.
The annual energy-use number can usually be found in manufacturer specifications or federal EnergyGuide information.
Dishwasher Operating Cost Calculator
Estimate electricity, water and sewer cost per load, month and year.
What the Default Calculator Shows
The default calculation uses:
- 240 kWh/year annual electricity use
- 18.34¢/kWh electricity
- 3.2 gallons of water per cycle
- $15 per 1,000 gallons for combined water and sewer
- Approximately 4.13 loads per week
That produces approximately:
- 1.12 kWh per cycle
- $0.20 electricity per cycle
- $0.05 water and sewer per cycle
- $0.25 total utility cost per cycle
At about 215 cycles per year, that is roughly:
$54 per year in dishwasher electricity, water and sewer cost.
Again, the $15 water-and-sewer input is an illustrative assumption, not a national average.
Where the 240 kWh and 3.2 Gallons Come From
The current ENERGY STAR Version 7.0 requirements for standard-size residential dishwashers are:
| Dishwasher Type | Annual Energy | Water / Cycle |
|---|---|---|
| Standard ENERGY STAR | ≤ 240 kWh/year | ≤ 3.2 gal |
| Compact ENERGY STAR | ≤ 155 kWh/year | ≤ 2.0 gal |
These are qualification limits.
They do not mean every ENERGY STAR dishwasher uses exactly 240 kWh or 3.2 gallons.
Some certified models use less.
For a real household estimate, the exact dishwasher's model-specific information is more useful than the ENERGY STAR maximum.
How to Calculate Dishwasher Electricity Cost Per Cycle
The simplified CostCandid calculation is:
=
Approximate kWh Per Cycle
Approximate kWh Per Cycle
×
Electricity Rate
=
Electricity Cost Per Cycle
For the 240-kWh ENERGY STAR benchmark:
240 ÷ 215 ≈ 1.12 kWh per cycle.
At 18.34¢/kWh:
1.12 × $0.1834 ≈ $0.20 per cycle.
Why This Is an Approximation
There is an important limitation to this calculation.
The standardized annual energy-use figure is not simply a meter reading from 215 identical wash cycles.
The DOE test procedure is used to determine annual energy consumption and can account for factors beyond only active washing.
So:
Annual kWh ÷ 215
is best treated as a practical cost-estimation method, not a laboratory measurement of one specific cycle in your kitchen.
If you have measured electricity consumption for your actual dishwasher and cycle, that measurement can provide a more direct per-cycle estimate.
How to Calculate Water and Sewer Cost Per Load
The formula is simpler:
×
Combined Water + Sewer Rate
=
Water and Sewer Cost Per Cycle
For example:
3.2 gallons ÷ 1,000 × $15 = $0.048.
Rounded:
about 5 cents per cycle.
How to Find Your Real Utility Rates
National averages are useful for examples, but your own utility bills produce a better estimate.
Electricity
Look for a rate shown in cents per kilowatt-hour or dollars per kilowatt-hour.
If your bill has multiple variable charges tied directly to kWh consumption, the effective marginal cost of additional electricity may differ from one simple headline rate.
Water and Sewer
Water billing is often more complicated because utilities may use:
- Fixed charges
- Usage charges
- Tiered rates
- Separate sewer charges
The calculator uses a combined dollar-per-1,000-gallon input for simplicity.
If most of your bill is fixed regardless of usage, the true incremental cost of one extra dishwasher load may be lower than a simple average-rate calculation suggests.
Usage Frequency Matters More Than It Looks
The federal standardized annual-energy calculation uses 215 cycles per year.
That is approximately:
4.13 loads per week.
| Usage | Approx. Cycles / Year |
|---|---|
| 3 loads/week | 156 |
| 4.13 loads/week | About 215 |
| 1 load/day | 365 |
| 2 loads/day | 730 |
A dishwasher that costs only 25 cents per load can still have very different annual costs in those households.
Does Heated Dry Change the Cost Per Cycle?
Potentially.
Dishwashers consume energy for washing, water heating and drying depending on the model and selected settings.
A cycle using additional heated drying may consume more electricity than a lower-energy drying option.
But there is no universal dollar amount for the difference.
Drying technology and controls vary by dishwasher.
If you want to know the effect for your specific unit, check its manual, product documentation or measure the cycle directly with appropriate equipment.
Does Running the Dishwasher at Night Cost Less?
Only if your electricity rate changes by time of day.
If you're on a flat residential electricity rate, running the same cycle at 2 p.m. or 10 p.m. generally doesn't change the per-kWh price.
If you're on a time-of-use plan, however, moving dishwasher operation into an off-peak period can reduce the electricity portion of the cycle cost.
How to Lower Cost Per Load
Run appropriately full loads. Cleaning more dishes in each successful cycle lowers the utility cost per dish.
Avoid unnecessary cycles. A second cycle because of poor loading or inappropriate settings doubles much of the operating cost.
Choose the appropriate wash cycle. Don't automatically use a more intensive cycle when the load doesn't need it.
Use lower-energy drying settings when appropriate.
Check your real electricity rate. Time-of-use pricing can make timing relevant.
Keep the dishwasher maintained. Follow the manufacturer's cleaning and maintenance instructions so performance problems don't lead to repeated washing.
What Number Should You Use for Your Dishwasher?
For a household estimate, use the specifications for the dishwasher you actually own or are considering.
Useful information includes:
- Annual energy use in kWh
- Water use per cycle
- Your electricity price
- Your water and sewer rate
- Your actual cycles per week
The ENERGY STAR benchmark is useful when you need a starting point.
Your own model and utility data are better when you have them.
Frequently Asked Questions
How much does it cost to run a dishwasher once?
Using the default CostCandid example of 240 kWh/year, 18.34¢/kWh electricity, 3.2 gallons per load and a $15-per-1,000-gallon combined water and sewer assumption, the estimated total is about 25 cents per cycle.
How much electricity does a dishwasher use per cycle?
It varies by model and cycle. Dividing the ENERGY STAR standard-size maximum of 240 kWh/year by the standardized 215 cycles/year produces an approximate benchmark of 1.12 kWh per cycle. That is an estimation method rather than a direct measurement of one cycle.
How much water does an ENERGY STAR dishwasher use?
Under current ENERGY STAR Version 7.0 criteria, a standard-size certified dishwasher must use no more than 3.2 gallons per cycle. Compact certified dishwashers must use no more than 2.0 gallons per cycle.
Why does ENERGY STAR use 215 cycles per year?
The DOE test procedure used for ENERGY STAR annual energy calculations uses an average of 215 cycles per year. It is a standardized test assumption, not a claim about how often every household uses a dishwasher.
How much does a dishwasher cost per month?
Multiply your estimated cost per cycle by the number of cycles you run in a month. At about 25 cents per cycle and roughly 18 loads per month, the default example is around $4.50 per month.
Does running the dishwasher every day cost a lot?
At 25 cents per cycle, one load every day would be roughly $91 per year in simplified utility-cost estimates. Your result can be higher or lower depending on the dishwasher and utility rates.
Does heated dry increase dishwasher electricity cost?
It can. The effect depends on the dishwasher's drying system and selected settings, so there is no single cost increase that applies to every model.
Should I run the dishwasher only when it is full?
Using a dishwasher efficiently generally means avoiding unnecessary partially filled cycles while still loading the machine according to the manufacturer's instructions. Overloading can reduce cleaning performance and potentially cause another cycle to be needed.
The Bottom Line
A dishwasher's cost per cycle is small enough to disappear inside a monthly utility bill.
But it is easy to calculate once you separate electricity from water and sewer.
Electricity Per Cycle
+
Water & Sewer Per Cycle
×
Usage Frequency
For the default CostCandid benchmark, the result is about 25 cents per load.
Use the calculator with your dishwasher's actual specifications and your own utility rates for a better estimate.
CostCandid Methodology
This article is designed specifically to estimate dishwasher operating cost. It does not compare dishwasher purchase prices, calculate an efficiency-model payback period or compare machine washing with hand washing.
Those are separate buying and behavior questions.
The calculation used here is:
Annual Dishwasher kWh ÷ 215
Electricity Cost Per Cycle
Approximate kWh Per Cycle × Electricity Rate
Water + Sewer Cost Per Cycle
Gallons Per Cycle ÷ 1,000 × Combined Water/Sewer Rate
Total Cost Per Cycle
Electricity Cost + Water/Sewer Cost
Estimated Annual Operating Cost
Cost Per Cycle × Cycles Per Week × 52
The 240-kWh/year and 3.2-gallon/cycle defaults are current ENERGY STAR maximum qualification criteria for standard-size residential dishwashers.
The 215-cycle figure comes from the applicable DOE standardized test methodology.
The default 18.34¢/kWh electricity rate is the June 2026 U.S. residential average published by the U.S. Energy Information Administration.
The $15 per 1,000 gallons water-and-sewer input is an editable illustration, not a U.S. national average.
Data checked: September 2026.
Sources
- ENERGY STAR — Dishwasher Key Product Criteria
- ENERGY STAR — Residential Dishwashers
- U.S. Department of Energy FEMP — Purchasing Energy-Efficient Residential Dishwashers
- U.S. Department of Energy — Consumer Dishwashers
- U.S. Energy Information Administration — Electric Power Monthly
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