Laundry Cost Calculator

Introduction: What a Single Load of Laundry Really Costs

A load of laundry never shows up as its own line on any bill, which is exactly why its cost hides in plain sight. The washer sips a little electricity and some water, the dryer draws a lot of electricity (or a bit of gas) for half an hour, and a scoop of detergent quietly disappears. None of those feel like money at the moment you press start, yet a household running five or six loads a week is spending somewhere between $150 and $400 a year on the routine. This calculator pulls those hidden pieces apart so you can see a single number: what one complete wash-and-dry cycle actually costs on your equipment, at your utility rates.

Once you have that per-load figure, it becomes a decision tool. It tells you whether the laundromat down the street is really cheaper, how much a longer dryer cycle is quietly adding to the bill, and whether a high-efficiency machine would pay back its price within a few years. The estimate covers the three costs you actually control load to load — electricity for the washer and dryer, water and sewer charges for the wash, and detergent — while deliberately leaving out the fixed price of owning the machines, which is covered further down.

How to Use the Laundry Cost Calculator's Inputs

Each field below maps to one physical part of a laundry cycle, and the tool turns them into energy, water, and supply costs before adding everything up. You can pull most values straight off appliance labels and a recent utility bill; where you are unsure, the ranges given in each section are reasonable stand-ins for a first estimate.

1. Washer power and wash time

Washer Power (kW) is the electrical power draw of your washing machine during the cycle. Many modern residential washers fall roughly between 0.3 kW and 2.0 kW, but you should check the label or manual for a more precise value if possible.

Wash Time (minutes) is the typical length of a wash cycle that you run most often (for example, a normal or eco cycle). To get the energy used by the washer per load, the calculator converts minutes to hours and applies this formula:

where:

• E is energy used by the washer in kilowatt-hours (kWh).
• P is washer power in kilowatts (kW).
• t is wash time in minutes.

The cost of running the washer per load is then:

Washer cost = Washer kWh × Electricity rate ($/kWh)

2. Dryer power and dry time

Dryer Power (kW) is the electrical demand of your dryer while it runs. Electric dryers commonly use 3 kW to 5 kW or more. Even if your dryer cycles the heating element on and off, this simple calculation gives a good average.

Dry Time (minutes) is how long you normally run the dryer per load. The energy used and cost are calculated the same way as for the washer:

• Dryer kWh = Dryer power (kW) × Dry time (minutes ÷ 60)
• Dryer cost = Dryer kWh × Electricity rate ($/kWh)

3. Water usage and water price

Water Usage (gallons) is the amount of water your washer uses per load. Efficient front-load washers can use around 15–20 gallons, while older or less efficient top-load models may use 30–40+ gallons per load.

Water Price per Gallon ($) comes from your water bill. Often it is listed per thousand gallons or per cubic meter. To use the calculator, convert it to a per-gallon rate, or use an approximate value if you prefer a rough estimate.

The water cost per load is simply:

Water cost = Water usage (gallons) × Water price per gallon ($/gallon)

4. Detergent and supplies

Detergent Cost per Load ($) is what you spend on detergent and any regular additives (such as fabric softener or boosters) for a single load. If you buy detergent in bulk, divide the total price by the number of loads the package states to estimate a per-load cost.

This value is added directly to your total:

Detergent cost = Entered cost per load

The Complete Per-Load Cost Formula

With each component priced, the total is just a sum. There is no weighting or discount factor hiding in the tool — the four pieces you entered are added exactly as they are, which keeps the result easy to audit against your own bill:

Here C_load is the total cost per load, P_w and P_d are the washer and dryer energy in kWh, r is your electricity rate, C_gas is the gas-dryer cost (zero for an electric dryer), g is gallons of water, p is your water-and-sewer price per gallon after the unit conversion, and C_det is detergent per load. Multiply C_load by the loads you run each week, month, or year to turn a single cycle into an annual number worth acting on.

Reading Your Per-Load Laundry Result

The number the calculator returns is the estimated cost of one complete load — wash plus dry — on your machines and at your rates. On its own a figure like "$0.87" means little, so it helps to know where your result sits relative to typical households:

• Under about $0.75 per load: This is typically a low cost, often seen with efficient machines, moderate electricity prices, and careful water use.
• Around $0.75–$1.50 per load: This is a common range for many households, especially with standard washers and dryers and mid-range utility rates.
• Above $1.50 per load: Costs in this range can indicate high local electricity or water prices, older or inefficient appliances, very long cycles, or expensive detergent.

To get a sense of long-term impact, consider how many loads you run:

• Weekly cost: Per-load cost × loads per week.
• Monthly cost: Per-load cost × (loads per week × 4.3).
• Yearly cost: Per-load cost × 52 weeks × loads per week.

For example, if your per-load cost is $1.00 and you do 6 loads per week, that is roughly $6 per week, about $26 per month, and more than $300 per year.

Worked Example: Step-by-Step Laundry Cost

To see how all of this comes together, imagine the following scenario:

• Washer power: 0.5 kW
• Wash time: 45 minutes
• Dryer power: 4.0 kW
• Dry time: 40 minutes
• Water usage: 25 gallons
• Water price: $0.004 per gallon
• Detergent cost: $0.25 per load
• Electricity rate: $0.15 per kWh

1. Washer electricity cost

• Convert time to hours: 45 minutes ÷ 60 = 0.75 hours.
• Washer energy use: 0.5 kW × 0.75 h = 0.375 kWh.
• Washer cost: 0.375 kWh × $0.15/kWh = $0.05625 (about $0.06).

2. Dryer electricity cost

• Convert time to hours: 40 minutes ÷ 60 ≈ 0.67 hours.
• Dryer energy use: 4.0 kW × 0.67 h ≈ 2.67 kWh.
• Dryer cost: 2.67 kWh × $0.15/kWh ≈ $0.4005 (about $0.40).

3. Water cost

• Water cost: 25 gallons × $0.004/gallon = $0.10.

4. Detergent cost

• Detergent cost per load: $0.25.

5. Total per-load cost

• Total cost = Washer ($0.06) + Dryer ($0.40) + Water ($0.10) + Detergent ($0.25)
• Total cost ≈ $0.81 per load.

With these assumptions, each load of laundry costs you about 81 cents. If you run 6 loads per week, your estimated yearly cost is:

• 6 loads/week × $0.81 × 52 weeks ≈ $252.72 per year.

This simple example shows how small changes—like shorter dryer times, a more efficient washer, or cheaper detergent—can noticeably reduce your annual spending.

Typical Cost Ranges and Comparisons

Your exact numbers will vary, but it can be helpful to compare your result to some typical ranges. The table below summarizes approximate per-load costs under different conditions. These are illustrative values, not guarantees.

If your calculated cost per load is much higher than the typical home ranges above, you may want to investigate:

• Whether your cycles are longer or hotter than necessary.
• If your appliances are unusually old or inefficient.
• Whether local electricity or water rates are particularly high.

Using Your Results to Save Money

Once you know your per-load cost, you can use it to explore savings strategies.

• Adjust your schedule: If your utility offers time-of-use pricing, running loads during off-peak hours can reduce the electricity rate you enter and lower the result.
• Optimize cycles: Shorter or eco cycles, lower wash temperatures, and proper spin speeds can reduce both wash time and dry time.
• Improve drying efficiency: Cleaning the lint filter, not overloading the dryer, and air-drying some items can cut dryer run time and energy use.
• Upgrade when it makes sense: If your yearly laundry cost is high and your machines are older, comparing the annual savings from new appliances to their purchase price can help you judge whether an upgrade is worthwhile.
• Choose cost-effective detergent: Concentrated detergents used at the recommended dose can lower per-load detergent cost without sacrificing cleaning performance.

What This Laundry Estimate Assumes, and Its Limitations

This tool is a practical usage estimate, not a full accounting of every dollar laundry touches. Knowing where it draws its boundaries keeps you from over-trusting the result. The main simplifying assumptions and limitations are:

• Electricity focus: The tool uses your entered washer and dryer power ratings and times to estimate electricity use. It does not include gas costs for gas dryers or gas-powered water heaters.
• Average power draw: The power values you enter are treated as an average over the whole cycle, even though real machines may vary their draw during different stages.
• Water pricing: The water price per gallon is assumed to include any sewer or wastewater charges that are bundled into your utility bill, if you choose to reflect them.
• Detergent and supplies only: Only the detergent cost per load you provide is included. Other occasional items (like stain removers or dryer sheets) are not automatically factored in unless you include them in your per-load estimate.
• No equipment ownership costs: The calculator does not account for the purchase price of your washer and dryer, installation costs, maintenance, repairs, or eventual replacement.
• Taxes and fees: Any taxes, fixed service fees, or minimum charges on your utility bills are not explicitly modeled. The tool focuses on usage-based costs.

The updated form supports either an electric dryer estimate or a gas dryer estimate. For water and sewer charges, enter the combined rate from your utility bill and choose the unit shown on the bill so the calculator can convert it to a per-gallon cost.

Because of these limitations, the result should be viewed as an approximate guide rather than an exact bill calculation. However, it is still very useful for comparing scenarios, such as different cycle settings, new appliances, or changes in utility prices.

Turning Your Laundry Numbers Into Decisions

A per-load figure is most useful when you run it more than once. A few comparisons worth making with the calculator:

• Re-run it with the dryer time cut by ten minutes, or a cold wash in place of warm, to put a dollar value on the habit change before you commit to it.
• Multiply your result by your real weekly load count to get a monthly and annual figure — the number that tells you whether laundry is worth optimizing at all.
• Compare your home cost against the $2–$5 a laundromat charges per load, keeping in mind that the laundromat price already bundles in machine ownership that this tool leaves out of your home number.

Utility rates drift, seasons change how often you wash, and appliances age. Coming back to recalculate once or twice a year keeps the estimate honest and shows you whether your laundry spending is trending up or down.