How Much Water Does a Washing Machine Use?

A modern washing machine uses about 10 to 20 gallons (38 to 76 liters) of water per load, while an older top-loader with a central agitator can use 35 to 45 gallons (130 to 170 liters). Over a year of typical family laundry, that gap adds up to thousands of gallons. Here is what each type of washer uses, why the numbers differ, and how to estimate your own.

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Washing machine water use at a glance

Water use per load is driven mainly by the machine's design. These are typical ranges for a full load on a normal cycle:

The difference comes down to how the machine gets clothes clean. An agitator top-loader fills the tub high enough to submerge the load and swishes it around. A front-loader lifts and drops clothes through a shallow pool at the bottom of the drum, so it needs far less water for the same job.

These ranges are typical figures, not exact ones. Your machine's real use depends on its model, cycle and load. Check the owner's manual or the yellow EnergyGuide label for the rated water figure.

How much water a washer uses per year

Per-load numbers look small until you multiply them. Here is a yearly total for three laundry habits, comparing an efficient front-loader at about 15 gallons per load with an older top-loader at about 40:

A busy household running a load a day can save roughly 9,000 gallons a year just by replacing an old agitator machine with an efficient one. For most homes, laundry is one of the larger indoor uses, on the order of one-sixth of the total, which makes the washer worth a look if you are trying to cut your water bill.

Water factor: how to work it out

Manufacturers rate washers with a water factor, the gallons of water used per cubic foot of drum capacity in a standard test. Lower is better, and it lets you compare machines of different sizes fairly. To estimate one full load, multiply the water factor by the drum capacity:

To turn that into an annual figure, multiply by your loads per year:

You can skip the arithmetic with the washing machine water usage calculator, which handles the unit conversions and your own load count.

What changes the amount of water used

Machine type and age. This is the biggest factor by far. Moving from an older agitator top-loader to an efficient front-loader or impeller top-loader typically cuts water use by more than half.

Load size. Many modern washers sense the load and adjust the fill, but the adjustment is rarely proportional. A half load usually uses well over half the water of a full one, so full loads are the efficient choice.

Cycle and options. Heavy-duty, bulky, sanitize and extra-rinse options all add water. A normal or eco cycle uses the least. Some machines also run an extra rinse automatically when they detect a lot of detergent.

Water level setting. Many top-loaders let you choose the fill level. Picking a level that matches the load, rather than defaulting to maximum, saves water on every wash.

Detergent. Using too much detergent creates suds that the machine has to rinse away, which can trigger extra rinses. High-efficiency machines need high-efficiency detergent for this reason.

Water temperature. The temperature setting changes the energy used to heat water, not the volume of water in the drum. Hot washes do add a hot-water cost, but not extra gallons.

Common real-world examples

Here is what the numbers look like for a household doing about 300 loads a year, or roughly six loads a week. The cost figures are illustrative and assume a combined water and sewer rate of $10 per 1,000 gallons. Check your own bill for the real rate.

How to use less water in the laundry

Wash full loads. Fewer, fuller loads use less water than many partial ones. Just do not overpack the drum, or clothes will not rinse well.

Match the water level to the load. If your machine has a manual setting, do not leave it on the maximum.

Use the right detergent, and the right amount. Less suds means fewer extra rinses. Follow the dosing marks on the bottle.

Choose efficient cycles. Normal and eco cycles cover most laundry. Save extra-rinse and heavy-duty options for when you actually need them.

Fix leaks. A worn hose or drain connection can waste far more water than a cycle option. Check behind the machine for damp spots or slow drips.

Consider replacing an old machine. If yours dates from before the mid-2000s and uses a central agitator, an efficient replacement can pay for part of itself over time in lower water, sewer and energy bills.

The bottom line

A modern efficient washer uses about 10 to 20 gallons per load, and an older agitator model can use 35 to 45. At around 300 loads a year, that is the difference between roughly 4,500 and 12,000 gallons. To estimate your own use, multiply your washer's water factor by its capacity, then by the loads you run. For a personalized figure, try the calculator below.