Over-the-Range Microwave 15 Inch Height: What Fits and How to Measure

A 15-inch-high over-the-range microwave is uncommon; most OTR models run 15 to 18 inches tall, with low-profile units around 10 inches and standard units near 17 inches.

Cabinets built for a 15-inch-tall unit are rare, and the real problem is usually vertical clearance, not the height on the spec sheet. The space between your cooktop and the bottom of the upper cabinet decides what fits, before brand, wattage, or price matter. Measure that gap first, then match a model to it.

How Tall Are Over-the-Range Microwaves Really?

Over-the-range microwaves span roughly 10 to 18 inches in height, so a 15-inch unit sits near the middle rather than standing out as its own size class. Widths run 24 to 30 inches, and closed-door depth runs 15 to 18 inches.

The two shapes on a showroom floor:

• Low-profile models — about 10 inches tall, for kitchens where the cabinet-to-cooktop gap is tight.
• Standard OTR models — commonly about 17 inches tall, the size most 30-inch cabinet setups were designed around.

A 15-inch unit splits the difference. That’s why it’s uncommon: it’s not a category manufacturers build toward, it’s a size that appears when a particular model’s chassis happens to land there. Don’t shop by height alone — shop by the model’s installation sheet, which states the exact mounting height and clearances.

Measure These Four Things Before You Buy

Four measurements determine fit: the cabinet opening width, the depth including door swing, the vertical gap from cooktop to upper cabinet, and the mounting height from floor to the appliance. Get all four wrong and the microwave sits in its box.

1. Cabinet opening width. Most OTR units are designed for 30-inch cabinetry. Measure the actual opening, not the cabinet’s outer face.
2. Cooktop-to-cabinet gap. Measure from the cooking surface to the underside of the upper cabinet where the unit would mount. Compare that number to the model’s installation sheet — required clearances vary by unit.
3. Depth, including the open door. Closed-door depth is 15 to 18 inches, but open-door depth reaches 42 to 45 inches. Check that the door clears your countertop appliances, your island, and your walking path.
4. Mounting height off the floor.

OTR Sizes and Clearance at a Glance

One warning: a countertop microwave cannot be mounted over a range. Only units specifically made for OTR use, with a vent, belong above a cooktop. For gas and electric ranges, required clearance depends on the manufacturer’s instructions and local code, so the installation sheet wins over any generic number.

Don’t assume every OTR unit is the same height, and don’t trust generic clearance advice over the model’s own paperwork. If you’ve already measured and want a shortlist, these tested 15 inch high over-the-range microwave picks are matched to real cabinet clearances.

The Order to Do This In

1. Measure the cooktop-to-cabinet gap and write it down.
2. Measure the cabinet opening width and the depth including door swing.
3. Pull the model’s installation sheet and confirm the mounting height and clearances — GE’s minimum air clearance requirements are a useful cross-check for the floor-to-appliance figure.
4. Confirm the unit is listed for OTR use and includes a vent.
5. Check the 54-inch usability ceiling for the unit’s bottom edge.
6. Buy only after steps one through five all match.

If your gap is short and you’re weighing a lower-profile unit instead, the same measuring steps apply — but the trade-off is real: low-profile models bring less interior cooking space, so compare capacity before committing to the shorter chassis.