MICROWAVE SIZES: A GUIDE TO COMMON DIMENSIONS

Microwave sizes are fairly standardized with most over-the-range microwaves measuring around 30" wide, 17" high and 15" to 18" deep with the door closed. Built-in microwave sizes also tend to match standard cabinet dimensions.

While browsing products, look at the cutout dimensions as well as the product dimensions to help you find a microwave that fits in your existing cabinetry. Exterior dimensions help determine how much space you’ll need to accommodate your appliance, while interior capacity determines how much cooking space you’ll have inside the appliance. If you’re shopping for a countertop microwave, you can take your pick of compact or extra large sizes to fit your available space and mealtime needs.

Countertop microwaves can be placed on any stable, flat surface. Some countertop microwaves can also be installed in cabinets with an additional trim kit. A trim kit includes a frame and ducts that encase the microwave inside a cabinet cutout for a built-in look.

Depending on your counter space, you may want to opt for a compact or small microwave over a standard or large size. This will also depend on your cooking needs—be sure to check the sizes listed to find one that suits your cooking style.

• Capacity usually delivers around 0.5 to 0.9 cubic feet of interior space.

• Width typically ranges from 15 to 19 inches.

• Height often runs from 10 to 11 inches.

• Depth is measured with the door closed and open since you’ll need enough space for the door to fully swing out. Closed-door depths range from about 12 to 16 inches. Open-door depths range from about 23 to 30 inches.

• Capacity usually comes in just over 1.0 cubic foot up to around 2.2 cubic feet on the larger end.

• Widths can range from about 21 to 25 inches. If you’re installing in cabinets, a trim kit will usually bring the width to 27 or 30 inches. 

• Height is usually around 12 to 15 inches.

• Closed-door depths range from roughly 16 to 20 inches. Open-door depths range from roughly 34 to 39 inches.

Over-the-range microwaves let you get your microwave off the countertop. Most also function as kitchen vent hoods to help vent out smoke, odor and grease coming off the cooktop below.

• Interior space ranges from about 0.8 cubic feet for more compact microwaves up to around 2.1 cubic feet for full-sized models. Low-profile models usually offer just over 1 cubic foot of space.

• Widths will generally be roughly 30 inches to match the standard width of the range below and the standard cabinet width where the microwave will be mounted. Compact over-the-range microwaves are less common but are usually around 24 inches wide. Compact and low-profile microwave widths may vary by cutout and installation needs.

• Heights are usually around 17 inches. If you’re working with a shorter cutout, look at low-profile microwaves, which are generally a little over 10 inches high to make more room above the range. 

• Closed-door depths range from 15 to 18 inches. Open-door depths range from 42 to 45 inches. Because over-the-range microwaves all have similar widths, the open-door depths will also be similar.

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Built-in microwaves are installed directly into pre-existing cabinetry, creating a clean, flush look and opening up space elsewhere in the kitchen. They can be installed in a cabinet or under a counter, and often pull out like a drawer or open down like a wall oven.

It’s important to measure the height, width and depth of your existing microwave enclosure to ensure a proper fit. Door style and clearance may also affect installation. Cabinet fit relies on the model’s cutout specs, trim configuration and door-opening style, not just the width. 

• Capacity often ranges from about 1.0 to 2.2 cubic feet, with most landing between 1.2 to 1.6 cubic feet. 

• Widths align with standard cabinet widths, usually 24, 27 or 30 inches.

• Height typically ranges from 17 to 22 inches. 

• Depths range from roughly 20 to 25 inches with the door closed and 30 to 35 inches with the door open.

Skim through the microwave size comparison chart below to learn about the common heights, widths and depths of different microwave types to help determine what size microwave could work best for your kitchen.

*The numbers in this chart are general estimates. Some models vary.

How to measure microwave dimensions depends on what type of microwave you are planning to install. You’ll want to measure the height, width and depth of your microwave, as well as the installation space, ventilation needs and the full door swing of the microwave to help get the right fit.

When figuring out what size microwave you need, measure the height, width and depth of your current microwave or the space on your countertop or shelves you want it to occupy. 

Account for the following: 

• 1 inch of ventilation space between the microwave and the wall behind it for proper airflow.

• 3 inches of space from the edge of the counter to the open microwave door to help keep the microwave stable on the counter.

• At least 2 feet of space between the microwave and the range.

• Consider the depth with the door open to ensure you have enough space for the full swing-out of the microwave door.

Measuring the height, width and depth of your existing microwave enclosure is important when it comes to over-the-range and built-in microwaves. If you’re measuring for a new microwave, rather than replacing, measure the area where you plan to install it.

Measure cabinet-to-cabinet accounting for the following:

• 30 inches from the top of the stove to the top of the cabinet cutout for over-the-range microwaves.

• 6 inches of clearance between any walls and the microwave so the microwave door can open fully. 

• Check your manufacturer’s instructions to ensure you have the right amount of ventilation space around the microwave. Built-in microwaves usually require professional installation.

Get answers to frequently asked questions about microwave sizes, how to choose a microwave, installation and more.

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