Opening Size for a 27-Inch Wall Oven

Measure the width of both the front panel and the oven behind it. Generally, a 27-inch oven is installed in a 27-inch or wider cabinet.

Measure the height of the oven from top to bottom just behind the front panel. Oven heights vary, depending on the manufacturer and the type of wall oven such as a double oven or a conventional, convection or microwave oven.

Measure the oven from the back of the front panel to the back of the oven. Generally, this measurement is between 23 1/2 and 23 7/8 inches, depending on the manufacturer. Therefore, the minimum depth of the oven cabinet is 24 inches. With the width, height and depth of the oven, you can now frame the opening in the kitchen cabinet.