How Much Water Does a Dishwasher Use?

Your dishwasher is a steady presence in your nightly routine. But have you ever wondered how much water it actually uses? Does running it save water, or cost you more than you think?

Today’s dishwashers are smarter, sleeker, and far more efficient than models of the past. If you're thinking about upgrading or just curious if handwashing still holds up, we’re breaking it all down below.

 

 

How Many Gallons of Water Does a Dishwasher Use Per Cycle?

Modern built-in dishwashers typically use 3.5 gallons or less per cycle, while portable dishwashers may use slightly more water, depending on the model and size. Older dishwashers, especially built-ins from decades past, could easily double that. By comparison, hand-washing dishes can use up to 27 gallons if you leave the tap running.

Pro Tip: Energy Star-rated dishwashers, like the KitchenAid 24" PrintShield Stainless Steel Dishwasher (Model: KDFE204KPS), often use even less water thanks to smart sensors and optimized spray patterns.

 

Dishwasher vs Hand Washing: Which Uses Less Water?

Plenty of people still wash dishes by hand, thinking they’re saving money. The truth is that dishwashers almost always win when it comes to water and energy savings. They’re designed to use only the water they need — no more, no less. Plus, they heat water more efficiently than your sink does.

Handwashing not only wastes more water but also your time. So don’t feel bad about loading the dishwasher, pressing start, and enjoying your evening!

 

 

Do Quick Wash and Express Cycles Save Water?

Yes, but there’s a caveat. Quick or "Express" cycles, like those on the GE 24" Stainless Steel Built-In Dishwasher (Model GDT650SYVFS), are great for lightly soiled dishes and use less water and energy. However, for heavy-duty cleaning, the normal cycle is your most efficient choice overall because it reduces the need for rewashing.

Rule of thumb: The dirtier the dishes, the more water the dishwasher will use, but still far less than handwashing.

 

What Uses the Most Water in Your Home?

For context, let’s zoom out. Dishwashers are far from the biggest water hogs in your house. Here’s a quick look:

• Showers: 2-2.5 gallons per minute (a 10-minute shower = ~25 gallons)

• Toilet flush: ~1.6 gallons per flush

• Laundry: ~15-40 gallons per load, depending on machine age and cycle

In comparison, dishwashers use far less water overall.

 

Does Using a Dishwasher Raise the Water Bill?

Technically, any appliance that uses water will appear on your bill. But it’s a small blip compared to the potential cost (and environmental impact) of washing everything by hand. Plus, with energy-efficient dishwashers, you’ll save money on your utility bill with each load.

 

 

How to Use Your Dishwasher Efficiently to Save Even More Water

Even though modern dishwashers are built to save water, a few simple habits can make them even more efficient. The goal is to get spotless dishes without wasting a drop.

Here’s how to maximize every cycle:

• Only run full loads. It’s tempting to run the dishwasher after every meal, but waiting until it’s full makes the most of each gallon used.

• Scrape, don’t rinse. Modern dishwashers are designed to handle a little mess. Skip the pre-rinse and scrape food into the trash or compost instead.

• Choose the right cycle. Lightly soiled dishes? Opt for an eco or light wash setting. Save heavy-duty cycles for truly messy loads.

• Keep filters clean. A clogged filter makes your dishwasher work harder, potentially using more water. Give it a quick check and clean regularly.

• Load correctly. Make sure dishes aren’t blocking spray arms or stacked too tightly. Proper spacing ensures water reaches every item without needing a second wash.

Making these small tweaks to your kitchen cleanup routine will save even more water and get consistently clean dishes.

 

Upgrade Your Dishwasher at Metro Appliances & More

Still using an older model? Upgrading to a modern dishwasher helps conserve resources and saves on utility bills. At Metro Appliances & More, we carry a wide selection of water-efficient dishwashers from brands like GE, KitchenAid, and Bosch.

If you’re ready to explore the best dishwashers and more in person, contact us or visit us at one of our appliance store locations across Arkansas, Kansas, Missouri, and Oklahoma. 

Browse our appliances online, including refrigerators, ranges, laundry appliances, outdoor grills, and more.

👉 Explore dishwashers at Metro Appliances & More today!

Related readings from our blog:

• How to Clean a Smelly Dishwasher and Keep It Fresh

• To Repair Or To Replace

• Green and Clean: 5 Easy Eco-friendly Laundry Habits

 

 

FAQ: Common Dishwasher Water Use Questions

1. How much water does a 1-hour dishwasher cycle use?

Usually between 3 and 5 gallons. Quick cycles are efficient but vary by model.

2. Which dishwasher cycle uses the least water?

Quick or Express cycles typically use the least, but it depends on the model.

3. Do dishwashers save money on utilities?

Yes. Dishwashers use less water and heat more efficiently than handwashing, lowering energy and water costs.

4. What uses the most water in a house?

Showers and laundry are usually the biggest water users, while dishwashers use much less.

5. What is the difference between normal and 1-hour on a dishwasher?

Normal cycles are thorough and efficient for heavy loads. 1-hour cycles are faster but typically use more energy for less water.