How Much Water Does a Dishwasher Use?
Last updated October 31, 2026
A new standard 24-inch dishwasher uses about 3 gallons per cycle. The federal cap for a standard-size model made since May 30, 2013 is 5.0 gallons, and an ENERGY STAR model is capped at 3.2 gallons. An older machine from before 2013 typically uses 6 to 10 gallons, and one built before 1994 uses 9 to 14. Compact and countertop machines run lower, roughly 1.3 to 3.5 gallons.
Real households tend to use a little more, and the cycle you pick and the size of the machine move the number further than anything else.
Gallons per cycle by dishwasher type and age
The rated figure depends first on when the machine was built and how big it is. A full-size model from the 1990s could use three times the water of one sold today.
| Dishwasher type | Gallons per cycle |
|---|---|
| Standard, pre-1994 | 9 to 14 |
| Standard, 1994 to 2013 | About 6 to 10 (average around 10) |
| Standard, 2013 or later, not ENERGY STAR | Up to 5.0 |
| ENERGY STAR standard (24-inch) | 3.2 cap, typically 2.4 to 3.5 |
| 18-inch slim or compact | 3.5 federal cap, 2.0 ENERGY STAR cap, typically 1.6 to 3.1 |
| Drawer-style compact | 1.6 to 1.8 |
| Countertop with built-in tank | About 1.3 to 1.6 |
| Larger countertop with faucet hookup | 1.6 to 3.8 |
Your own machine can land higher in daily use, for reasons covered further down.
Why a dishwasher uses so little water
A dishwasher does not fill and drain the way a sink does. It takes in a small charge of water, roughly 1 to 2 gallons, then filters it, reheats it and sprays it through the arms for the whole wash phase. When the wash ends, the machine drains and takes another small charge for the rinse. A typical cycle is 2 to 4 water fills total.
That is how 3 gallons can clean a full load. The same water passes over the dishes again and again, and the filter keeps the food particles out of it. A person washing by hand under a running tap sends fresh water down the drain the whole time.
What your dishwasher's water use adds up to over a year
A household that runs five loads a week does about 260 cycles a year. Here is how the gallons add up on both counts.
| Water per cycle | 215 cycles a year | 5 loads a week (about 260) |
|---|---|---|
| 3.2 gallons | About 690 gallons | About 830 gallons |
| 5.0 gallons | About 1,075 gallons | About 1,300 gallons |
| 10 gallons | About 2,150 gallons | About 2,600 gallons |
Water is a small share of what it costs to run a dishwasher, and the exact share depends on your local water and sewer rates. Electricity is the large share, about 93% of the running cost. If you want to cut the bill, the energy side is where the savings are.
Water use compared with washing up
A modern dishwasher uses 3 to 5 gallons for a full load. Washing the same load by hand under a running tap uses roughly 10 to 27 gallons, depending on the faucet flow and how long the water runs. A standard kitchen faucet tops out around 2.2 gallons a minute, so five minutes of running water alone is about 11 gallons.
The dishwasher wins, and the gap widens with an ENERGY STAR model. A certified machine saves about 5,800 gallons over its lifetime, while washing by hand uses about 8,400 gallons a year. The one case where hand-washing uses less is a single item rinsed quickly in a bowl of water, not a full sink of dishes under a tap.
Lab rating vs. real-world use
The rated figure assumes the normal cycle with no pre-rinse. Field measurements of real households average about 6.1 gallons per load, higher than the label. People run heavy cycles, pre-rinse, and run partial loads, and each of those adds water.
Pre-rinsing under a running tap is the biggest culprit. A couple of minutes of rinsing can add 10 gallons or more, which is more than the whole cycle uses. Scraping solids into the trash gets the same result for none of the water.
How to find out how much water your dishwasher uses
Four places give you the figure for your own machine.
- The EnergyGuide label on the machine, which lists annual energy use and, on newer labels, gallons per cycle.
- The spec sheet or product page for the model.
- The ENERGY STAR Product Finder, where you search by model.
- The cycle chart in the owner's manual, which lists gallons per cycle for each cycle the machine offers.
The manual is the most useful of the four, because it breaks the number down by cycle instead of giving one average.
How to use less water
Most of the savings come from how you load and run the machine, not from the machine itself.
- Run full loads. A half load uses the same water for fewer dishes.
- Skip the pre-rinse. Scrape solids into the trash instead of rinsing them down the sink.
- Use the eco or auto cycle for everyday loads.
- Use the half-load setting if the machine has one. It cuts the water, unlike running a partial load on a full cycle.
- Air-dry instead of heat-dry. That saves energy rather than water, but it is worth the switch.
A new standard 24-inch dishwasher uses about 3 gallons per cycle, with a 5.0-gallon federal cap and a 3.2-gallon ENERGY STAR cap. Compact and countertop machines run 1.3 to 3.8 gallons, and an older machine can use 6 to 14. Against hand-washing at 10 to 27 gallons for the same load, the dishwasher is the lighter user of water by a wide margin.
Frequently asked questions
The number on the label is a rated figure from a standard test, so your own machine can land higher depending on the cycle you pick and whether you pre-rinse.
How much water does a dishwasher use per cycle?
A standard 24-inch model made since 2013 uses about 3 gallons on the normal cycle. Heavier cycles and older machines use more.
How much water does a dishwasher use per year?
At 3.2 gallons a cycle and 215 cycles a year, about 690 gallons. A 5-gallon machine comes to about 1,075 gallons, and an old 10-gallon machine to about 2,150. A household running five loads a week adds roughly 20% to each figure.
Do dishwashers use more water than hand-washing?
No. A full load in a dishwasher takes 3 to 5 gallons, while washing the same dishes by hand under a running tap takes roughly 10 to 27 gallons. The gap grows with an ENERGY STAR model.
How much water does an ENERGY STAR dishwasher use?
Certification requires at least 30% less water than the federal standard allows, which works out to a ceiling of 3.2 gallons for a full-size machine and 2.0 for a compact one.
How much water does an old dishwasher use?
Machines from before 1994 run 9 to 14 gallons per cycle, roughly three to four times what a machine sold today takes.
How much water does a compact or countertop dishwasher use?
The smallest figures come from countertop units with a built-in tank, at about 1.3 to 1.6 gallons, while a larger countertop unit plumbed to the faucet runs 1.6 to 3.8 and an 18-inch slim machine 1.6 to 3.1. Per place setting, though, a small machine can use more than a full-size one, because it holds fewer dishes.
Do dishwashers recycle water?
Yes, within a cycle. The wash water is filtered and sent back through the spray arms again and again, then drained before the rinse. That recirculation is why a few gallons can clean a full load.
How much does the water cost per load?
Water and sewer charges make up only a small slice of what a cycle costs to run, and the exact slice depends on your local rates. Electricity is the larger part of the running cost, so cutting the bill means cutting the energy, not the water.
How can I find my model's water use?
The manual is the only source that breaks the number down cycle by cycle, so you can see what a heavy or pots-and-pans run adds over the normal one. The EnergyGuide label, the spec sheet and the ENERGY STAR Product Finder each give a single rated number instead.