Best 30-Inch Microwaves

The 30-inch width is the US standard for over-the-range and built-in microwave installations — matching standard US range and cabinet widths. If you're replacing an existing OTR unit or fitting a new built-in, this is almost certainly the size you need. Enter your exact cabinet opening above to see which models will fit your specific cutout.

• ✓ The microwave's exterior width is always slightly under 30" — the cabinet cutout is typically 29⅞" wide. Measure your opening, not the old unit.
• ✓ OTR models in this width require a mounting bracket specific to the model — don't assume an old bracket fits a new unit.
• ✓ If replacing an existing OTR, also check the cutout height — not all 30" units share the same height requirement.
• ✓ Built-in models at this width need a trim kit to close the gap between the unit and the cabinet face — confirm it's included or sold separately.

102 models in this guide