Model shown: UDT518SAHP

From standard to small space, this guide can help you measure your cabinet opening, make decisions on interior layout, and ultimately find the right size dishwasher for your family.

What you’ll need:

  • Measuring tape
  • Opening for dishwasher
  • This guide

Standard dishwasher sizes

Dimensions of dishwashers are determined by the opening size they’re made to fit, rather than the measurements of the dishwasher. A dishwasher labeled as 24 inches wide might actually be more like 23-1/2 inches wide.

24-inch dishwasher measurements

Standard built-in dishwasher dimensions

A standard dishwasher is about 24 inches wide, 24 inches deep and 35 inches high. Most cabinet openings are made to fit a standard dishwasher size. Note that certain handles may affect the overall dishwasher depth.

Shop Whirlpool® Standard Size Dishwashers

Oversized dishwasher measurements

Oversized built-in dishwasher dimensions

Oversized dishwashers are built wider than the standard opening. An oversized dishwasher is about 30 to 42 inches wide, 24 inches deep and 35 inches high.

18 inch dishwasher measurements

Small space or compact built-in dishwasher dimensions

Designed for apartments, space-conscious homes and entertainment spaces, small space dishwashers have a slimmer width than standard dishwashers.  A compact dishwasher is about 18 inches wide, 24 inches deep and 35 inches high.

Shop Whirlpool® Small Space Dishwashers

Portable dishwasher measurements

Portable, in-sink and countertop dishwasher dimensions

Portable, in-sink and countertop dishwashers should not require an opening in your cabinetry, but you’ll still need to measure where they’ll go. Portable dishwashers are about 24 inches wide, 27 inches deep and 37 inches high.

Shop Whirlpool® Portable Dishwashers

How to measure a dishwasher for the right fit

If you’re wondering, “What size dishwasher do I need?”—we can help. Follow the steps below to find the right dishwasher size by measuring your current cabinet opening.

Step 1: Measure for dishwasher width

Standard dishwasher cutout
Small space dishwasher cutout

Standard cabinet opening width vs. small space cabinet opening width

  • Measure from cabinet to cabinet, making sure that the sides of your dishwasher will be completely enclosed once installed. It’s better to leave a little breathing room on each side than to have it be a tight fit.
  • You can install close to a wall or cabinet on one side as long as you leave at least two inches between it and the side of the dishwasher door.

Planning Tip: Utility placement can vary by model, so check your installation instructions for the specifics.

Step 2: Measure for dishwasher depth

Dishwasher cutout depth
  • Measure from the back of the opening to the front. 

  • Make sure to leave enough room (at least 27 inches) in front of the dishwasher to comfortably load and unload dishes, plus enough room to move around between the open door and any counters and islands.

  • Installing a dishwasher with a panel may affect depth.

Step 3: Measure for dishwasher height

Dishwasher cutout height
  • Measure from the floor of the opening in which the dishwasher will be installed to the lowest point of the countertop.

  • Most dishwashers require a 34 1/2–36-inch tall opening.
  • Additional layers of flooring in the kitchen may impact your installation process.

Getting the right layout

At some point, you’ll need to decide whether you want a front control or top control dishwasher. Front control dishwashers let you easily see and select cycles, while top control dishwashers hide controls for a more streamlined look.

You’ll also need to think about your dishwasher's interior. The exterior dimensions of a dishwasher rarely affect the interior capacity, but there are other ways to add increased space for dishes. Many dishwashers have two racks, but dishwashers with a 3rd Rack give you extra room for hard to fit items.


Learn more about the different types of dishwashers or check out the dishwasher buying guide to choose the best one for your kitchen

Shop Whirlpool® Dishwashers to fit your space

More ways to plan your kitchen

Make sure your refrigerator will fit

Refrigerator sizes: the guide to measuring for fit

Looking for the perfect fit? Here’s everything you need to know about assessing your space.

Find the microwave that’s right for you

How to buy a microwave that’s right for your family

Are you thinking about buying a microwave?

Choose your range type

Slide-in vs. freestanding ranges

If you’re moving into a new home or need to upgrade your kitchen appliances, you may find yourself looking for a new range.

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