How Much Does a Washing Machine Cost Per Load? Electricity + Water Cost Calculator
Every load of laundry uses more than electricity.
Your washing machine also uses water, and many households pay a wastewater or sewer charge for that water after it goes down the drain.
If you are shopping for a new machine, compare front-load and top-load washer costs over 10 years, including energy, water and purchase price.
So if you want to know what one load really costs, the useful calculation is:
Electricity + Water + Wastewater / Sewer
= Estimated Utility Cost Per Load
The calculator below converts your washer's published annual energy and water consumption into a per-load estimate, then projects that cost based on how often your household actually does laundry.
For a more complete laundry budget, compare gas and electric dryer operating and ownership costs separately from washing costs.
ENERGY STAR clothes-washer data uses 295 loads per year for its published annual energy and water estimates.
That means you can estimate standardized per-load consumption by dividing the washer's annual kWh and annual gallons by 295.
Then apply your own electricity, water and sewer rates.
Washing Machine Cost Per Load Calculator
For the best estimate, find your specific washer in the ENERGY STAR Product Finder or use the annual consumption information available for your model.
Washer Electricity + Water Cost Calculator
Enter annual washer consumption, your utility rates and your household's laundry frequency.
The default 120 kWh/year and 4,500 gallons/year are illustrative washer inputs. The electricity default uses the June 2026 U.S. residential average; the water + sewer default uses EPA WaterSense's 2024 national residential estimate. Enter your actual model and utility rates when possible.
How the Washing Machine Cost Per Load Formula Works
When you use ENERGY STAR annual washer data, the conversion is straightforward.
Annual kWh ÷ 295
Water Per Load
Annual Gallons ÷ 295
Electricity Cost Per Load
(Annual kWh ÷ 295) × Electricity Rate
Water + Sewer Cost Per Load
(Annual Gallons ÷ 295 ÷ 1,000) × Combined Water/Sewer Rate
ENERGY STAR's clothes-washer data documentation states that its annual energy and annual water estimates are based on 295 loads per year, approximately six loads per week.
That makes these annual figures useful for converting standardized product data into a rough per-load estimate.
What Does Annual Energy Use Include?
This part matters because otherwise it is easy to double-count energy.
ENERGY STAR's annual washer energy-use figure includes:
- Energy used by the washing machine
- Estimated energy needed to heat wash water when an electric water heater is assumed
So if you enter ENERGY STAR's published annual kWh figure into this calculator, do not add another full electric water-heating charge on top of it.
That would count some water-heating energy twice.
Where Can I Find My Washer's Annual kWh and Water Use?
The ENERGY STAR Product Finder provides model-level data for certified washers, including:
- Annual washer energy use in kWh/year
- Annual water use in gallons/year
- Integrated Modified Energy Factor (IMEF)
- Integrated Water Factor (IWF)
- Washer capacity
For example, current certified front-load listings include models with annual energy consumption around 74–108 kWh/year and annual water consumption around 3,400–4,400 gallons/year.
Those are examples from current certified-product listings, not universal washer averages.
Your own washer's published specifications are always more useful than a generic assumption.
Example: How Much Does One Load Cost?
Consider an illustrative washer with:
- 120 kWh/year
- 4,500 gallons/year
- 18.34¢/kWh electricity
- $16.83 per 1,000 gallons combined water + wastewater
Step 1: Electricity
Annual electricity-related cost:
120 × $0.1834 = $22.01 per year.
Per standardized load:
$22.01 ÷ 295 ≈ $0.075.
Step 2: Water + Sewer
Annual water and wastewater cost:
4.5 × $16.83 = $75.74 per year.
Per standardized load:
$75.74 ÷ 295 ≈ $0.257.
Step 3: Total
$0.075 + $0.257 ≈ $0.33 per load.
This is a utility-cost estimate only.
It does not include detergent, fabric products, appliance purchase price, maintenance or repairs.
Water and Sewer Can Cost More Than the Washer's Electricity
The example above produces an interesting result.
Electricity-related cost is only about 7.5 cents per standardized load, while water and wastewater are about 25.7 cents.
That does not mean water will always dominate your washer cost.
It means electricity alone is not enough to evaluate laundry operating cost.
Your result depends heavily on:
- Your washer's water consumption
- Your electricity price
- Your local water rate
- Your wastewater or sewer rate
Why the Calculator Includes Sewer Cost
EPA WaterSense estimates the 2024 national residential rates at:
| Utility | 2024 National Estimate |
|---|---|
| Water | $7.74 / 1,000 gal |
| Wastewater | $9.09 / 1,000 gal |
| Combined | $16.83 / 1,000 gal |
In that national estimate, wastewater actually costs more per 1,000 gallons than water supply.
So calculating washer cost with only the water-supply rate can materially understate the water-related utility cost.
Your own utility bill should replace the national estimate whenever possible.
Does Cold Water Reduce Washing Machine Cost?
Usually, yes.
ENERGY STAR says water heating consumes about 90% of the energy used to operate a clothes washer and recommends cold-water washing when appropriate.
But there is an important calculator limitation.
If you use ENERGY STAR's published annual energy figure, estimated electric water-heating energy is already incorporated into that annual number.
So this calculator intentionally does not add a second hot-water calculation.
A precise cold-versus-warm-versus-hot comparison would require a different set of assumptions.
How Much Does a Washer Cost Per Month?
Once you know cost per load:
Monthly Cost = Cost Per Load × Loads Per Week × 52 ÷ 12
Using the approximately $0.33-per-load example and six loads per week:
6 × 52 = 312 loads per year.
That produces roughly:
$103.50 per year
or approximately:
$8.63 per month.
The calculator performs this projection automatically using your entered laundry frequency.
What Changes the Cost Per Load Most?
Four variables matter most:
- Annual water use: especially where water and sewer rates are high
- Annual energy use: especially where electricity is expensive
- Wash temperature: because water heating can be energy-intensive
- Local utility rates: national averages can differ substantially from your actual bill
Loads per week does not change the standardized cost per load in this calculator.
It changes how often you incur that cost and therefore changes the monthly and annual household total.
Does Washer Type Matter?
Yes, but that is a different decision from calculating one load's cost.
ENERGY STAR says certified front-load washers use about 50% less energy and water than top-load agitator washers.
But lower utility consumption does not automatically mean a particular front-loader is cheaper to own.
Purchase price and other ownership costs also matter.
That's why CostCandid treats front-load vs. top-load purchasing economics separately from this per-load calculator.
Should You Replace a Washer Just to Save on Utilities?
Usually, this requires a separate payback calculation.
Suppose a new washer saves $40 per year in utilities but costs $800 to buy.
The utility savings alone would not create a fast payback.
But if your existing washer already needs replacement, energy and water consumption become useful variables when comparing new models.
This article therefore stops at operating cost per load rather than turning the calculation into a washer replacement recommendation.
What This Calculator Does Not Include
The result intentionally excludes:
- Detergent
- Fabric softener
- Washer purchase price
- Repairs
- Maintenance
- Financing
- Clothes-dryer electricity
This keeps the calculator focused on the search question:
How much do electricity, water and sewer cost for one washer load?
Frequently Asked Questions
How much electricity does a washing machine use per load?
If you are using ENERGY STAR annual data, divide the published annual kWh figure by 295 to estimate standardized energy use per load.
For example, 120 kWh/year divided by 295 is approximately 0.407 kWh per standardized load.
How much water does a washing machine use per load?
Using ENERGY STAR annual water data, divide annual gallons by 295.
For example, 4,500 gallons/year divided by 295 is approximately 15.3 gallons per standardized load.
Why does this calculator use 295 loads per year?
ENERGY STAR's current certified-product data documentation states that its annual energy and annual water figures are based on 295 loads per year under the referenced DOE test procedure.
Does the washer's annual kWh include hot-water energy?
ENERGY STAR states that its annual washer energy-use estimate includes energy used by the washer and energy needed to heat wash water assuming an electric water heater.
Should I include sewer charges?
Yes, if your household pays a wastewater or sewer charge related to water consumption. EPA WaterSense's national rate estimate includes both water and wastewater.
Does washing in cold water save electricity?
It can reduce water-heating energy. ENERGY STAR says water heating accounts for about 90% of the energy used to operate a clothes washer.
Does this include detergent?
No. The calculator is limited to electricity plus water and sewer utility costs.
Is this the same as the total cost of owning a washer?
No. Total ownership cost would also need to consider purchase price, maintenance, repairs, lifespan and potentially other expenses.
The Bottom Line
The cost of running a washing machine is not just an electricity calculation.
+
Annual Gallons ÷ 295
+
Your Utility Rates
= Estimated Utility Cost Per Load
Using the illustrative inputs in this article produces a result of roughly $0.33 per load.
But the useful number is not the national example.
It is the result you get after entering your washer's actual annual consumption and your local utility rates.
CostCandid Methodology
This article is designed as a pure operating-cost Search Asset.
It converts ENERGY STAR model-level annual energy and water consumption into standardized per-load consumption using the 295-load annual basis documented for the ENERGY STAR clothes-washer data.
The calculation is:
(Annual kWh ÷ 295) × Electricity Rate
Water + Sewer Cost Per Load
(Annual Gallons ÷ 295 ÷ 1,000) × Combined Water/Sewer Rate
Total Utility Cost Per Load
Electricity Cost + Water/Sewer Cost
Annual Household Cost
Cost Per Load × Loads Per Week × 52
The default 18.34¢/kWh electricity rate is the June 2026 U.S. residential average reported by the U.S. Energy Information Administration.
The default $16.83 per 1,000 gallons combined water and wastewater rate is EPA WaterSense's 2024 national residential estimate: $7.74 for water plus $9.09 for wastewater.
The default 120 kWh/year and 4,500 gallons/year washer inputs are illustrative rather than national washer averages.
The calculator excludes detergent, maintenance, repairs, purchase price and dryer costs.
Data checked: September 2026.
Sources
- ENERGY STAR — Clothes Washers
- ENERGY STAR — Certified Clothes Washer Product Finder
- ENERGY STAR — Clothes Washers Key Product Criteria
- U.S. Energy Information Administration — Residential Electricity Prices
- U.S. EPA WaterSense — Water and Wastewater Rate Data
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