Standard microwave dimensions range from 18 to 30 inches wide, 10 to 22 inches high, and 12 to 25 inches deep, depending on the type. Capacity runs from 0.5 to 2.2 cubic feet.
This guide breaks down every size, by type, brand, and kitchen need, so you can pick the right fit the first time.
Standard Microwave Dimensions by Type
Countertop Microwave Dimensions
Standard countertop microwave dimensions run 18 to 24 inches wide, 10 to 15 inches high, and 12 to 20 inches deep, with capacity between 0.5 and 2.2 cubic feet.
An open microwave door can extend the total footprint by 15 to 20 inches, which affects how close you can place the unit to a wall or edge.
Over-the-Range Microwave Dimensions
Most over-the-range models measure close to 30 inches wide, 16 to 18 inches high, and 15 to 18 inches deep, matching the width of a standard range below.
Low profile microwaves are a variation built for tighter cabinet gaps. They keep the same width but drop the height to around 10 to 11 inches, which frees up headroom above the cooktop without shrinking usable interior space much.
Built-In Microwave Dimensions
Their exterior dimensions are engineered to match standard cabinet openings: widths of 24, 27, or 30 inches, heights of 17 to 22 inches, and depths of 20 to 25 inches.
Because these units integrate directly into millwork, the cutout dimensions listed by the manufacturer matter more than the product’s raw exterior measurements.
Microwave Drawer Dimensions
Microwave drawers open from the top like a dishwasher, sliding out from beneath a counter. Exterior width is either 24 or 30 inches, with 24 inches being the more common residential choice.
Regardless of exterior width, interior capacity stays fixed at roughly 1.2 cubic feet, since the extra width on 30-inch models goes toward trim, not cooking space.
Convection Microwave Dimensions
Convection microwaves combine microwave and oven-style heating in one unit. Because they need extra components for air circulation and browning, exterior dimensions run slightly larger than standard countertop models with the same capacity, typically in the same 18-to-24-inch width range but with added internal insulation.
Capacity groups fall into three tiers: compact (0.5 to 0.8 cubic feet), mid-sized (0.8 to 1.4 cubic feet), and large (1.4 to over 2 cubic feet).
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Microwave Dimensions by Capacity
Small Microwave Dimensions
Small units hold 0.5 to 0.9 cubic feet. Exterior sizing runs about 15 to 19 inches wide, 10 to 11 inches high, and 12 to 16 inches deep. These fit single servings, dorm rooms, and break rooms, but struggle with large plates or tall containers.
Medium Microwave Dimensions
Medium units land between 1.0 and 1.4 cubic feet. Width increases to 21 to 25 inches, height to 12 to 15 inches, and depth to 16 to 20 inches. This is the sweet spot for most households, big enough for a dinner plate but still compact enough for a standard counter.
Large Microwave Dimensions
Large units reach 1.5 to 2.2 cubic feet, with widths often climbing to 27 or 30 inches once a trim kit is added. These handle casserole dishes, large mugs, and batch reheating, making them a common pick for bigger families.
Microwave Dimensions by Brand
Panasonic Microwave Dimensions
Panasonic is known for compact-to-mid-sized countertop units, often in the 1.2 cubic foot range, with widths near 20 inches.
Samsung Microwave Dimensions
Samsung offers a wide spread across countertop, over-the-range, and built-in categories, with several models exceeding 2.0 cubic feet in the large-capacity tier. Over-the-range Samsung units generally hold to the standard 30-inch width.
GE Microwave Dimensions
GE produces some of the most common over-the-range and built-in sizes on the market, closely matching the 30-inch width standard.
Whirlpool and Maytag Microwave Dimensions
Whirlpool and Maytag, both under the same parent company, share similar sizing across their lineups. Their over-the-range models typically measure 30 inches wide and 17 inches high, and their built-in units align with 24-, 27-, and 30-inch cabinet widths.
LG and Midea Microwave Dimensions
LG focuses on mid-to-large countertop and over-the-range units with smart features, generally within standard dimension ranges.
Midea is a major manufacturer behind several private-label brands and produces compact-to-medium countertop units, often prioritizing smaller footprints for apartment-style kitchens.
Choosing the Right Microwave Dimensions for Your Kitchen
Small Kitchens and Apartments
Compact countertop models under 1 cubic foot work well here. They free up counter space and handle daily reheating tasks without dominating a small kitchen footprint.
Family Kitchens and Meal Prep
Households cooking larger meals benefit from 1.5 cubic feet or more. Over-the-range or built-in models also clear counter space, which matters more as kitchen activity increases.
Kitchen Remodels and Cabinet Replacements
During a remodel, match new cabinet cutouts to standard microwave widths (24, 27, or 30 inches) before finalizing cabinetry. This avoids costly custom trim work later and keeps future replacements simple.
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How to Measure for the Right Microwave Dimensions
- Measure the full width, height, and depth of your installation space, whether it’s a countertop, cabinet, or over-the-range location.
- Measure cabinet-to-cabinet for built-in models, not the old microwave, since older units may not match current cutout standards. Over-the-range models typically require 30 inches of clearance between the stovetop and the bottom of the upper cabinet.
- Leave at least 1 inch of clearance on the sides and top for proper ventilation, and 2–6 inches at the back depending on the manufacturer’s airflow requirements.
- Allow 3 inches of front clearance so the microwave door can open without hanging over the countertop edge. Built-in models often require professional installation to ensure all clearances meet local building codes.
FAQs About Microwave Dimensions
Is a 1.6 cubic foot microwave big?
Yes. A 1.6 cubic foot microwave falls into the large capacity range and comfortably fits full plates, casseroles, and platters.
Is a 1.1 cubic foot microwave too small?
No, not for everyday use. A 1.1 cubic foot microwave handles daily reheating and small meals well, though oversized dinnerware may feel tight.
Is a 20-liter microwave big enough?
A 20-liter microwave equals roughly 0.7 cubic feet. It suits basic reheating and small portions but isn’t built for large dishes or batch cooking.
What size microwave fits a 30-inch cabinet?
Most over-the-range and built-in microwaves designed for 30-inch cabinets measure 29 to 30 inches wide. Always confirm with the manufacturer’s cutout specifications before installing.
How much clearance does a microwave need?
Countertop microwaves generally need 1 inch of clearance on the sides and top, and 2 to 3 inches at the back or front for ventilation and door swing.
What is the standard depth of a microwave?
Standard microwave depth with the door closed ranges from 12 to 25 inches, depending on the type, with built-in models running deepest due to cabinet integration.
James Walker is a content researcher and writer specializing in dimensions, measurements, size comparisons, and conversion topics. He creates clear, practical, and easy-to-understand guides that help readers visualize and understand real-world measurements.