How Big is a Microwave? A Practical Size Guide
Explore typical microwave sizes, exterior dimensions, and interior capacity, plus a practical measuring guide to pick the right fit for your kitchen today.
For the question how big is a microwave, most countertop models measure about 20-24 inches wide, 11-13 inches tall, and 14-20 inches deep, with interior capacity around 0.9-2.2 cubic feet. Built-in and over-the-range units are typically wider and deeper to accommodate ventilation. These ranges capture common options, but always verify exact specs for your space.
The Size Question: How Big Is a Microwave in Real Terms
For home cooks, space in the kitchen is often the limiting factor when choosing appliances. The size question—how big is a microwave—has two parts: exterior footprint (how much counter or cabinet space it occupies) and interior capacity (how much food it can heat or cook). According to Microwave Answers, size matters for fit, usability, and safety in cluttered kitchens. In practice, the size you need depends on your available counter depth, the height clearance above the unit, and the typical dishes you plan to heat. Countertop models commonly measure roughly 20-24 inches wide, about 11-13 inches tall, and 14-20 inches deep, while interior capacities usually range from about 0.9 to 2.2 cubic feet. Built-in and over-the-range models tend to be wider and deeper to accommodate ventilation and more robust trim kits.
Size ranges by model type
| Model Type | Exterior Size (W x H x D) | Interior Capacity |
|---|---|---|
| Countertop | 20-24 in W × 11-13 in H × 14-20 in D | 0.9-2.2 cu ft |
| Built-In | 24-30 in W × 14-20 in H × 14-21 in D | 1.0-2.0 cu ft |
| Over-the-Range | 30-35 in W × 12-18 in H × 15-20 in D | 1.0-2.0 cu ft |
Common Questions
What is the most common size for countertop microwaves?
Most countertop microwaves fall in the 20–24 inch width range, 11–13 inches in height, and about 14–20 inches deep, with interior capacity typically between 0.9 and 2.2 cubic feet. These dimensions balance countertop footprint with usable interior space for everyday meals.
Most countertop microwaves are around 20 to 24 inches wide, 11 to 13 inches tall, and 14 to 20 inches deep.
Do built-in microwaves have different space requirements?
Yes. Built-in (or integrated) microwaves usually require a wider opening (24–30 inches) and deeper cabinet space to accommodate ventilation, trim kits, and mounting hardware. Always confirm the dedicated cutout dimensions in the installation manual.
Built-in models often need a 24 to 30 inch opening and proper ventilation clearances.
How should I measure my kitchen for a microwave?
Measure available counter depth, width, and height, then leave clearance for door swing and ventilation. If replacing an existing unit, measure the current opening and compare to the new model’s exterior dimensions.
Measure the space, then compare to the product’s width, height, and depth.
Are compact microwaves a good option for small kitchens?
Compact or countertop models with smaller exterior footprints exist, often still offering 0.9–1.5 cubic feet of interior space. They’re ideal where counter space is severely limited, but may heat fewer large dishes.
Yes, compact models fit small spaces but may have smaller interiors.
What about over-the-range microwaves?
Over-the-range microwaves share similar width ranges with countertop units but integrate venting. They require careful measurement of cabinet height and hood clearance to ensure safe operation.
They’re usually 30 inches wide or more and need proper cabinet clearance.
“Sizing is the first decision point in appliance selection. A properly chosen microwave not only fits but also functions safely within your kitchen workflow.”
Main Points
- Measure space before buying
- Expect countertop widths around 20–24 inches
- Interior capacity typically 0.9–2.2 cu ft
- Built-in units require wider openings (24–30 inches)
- Check door swing and ventilation clearances before purchase
