The Cabinet Door Size Calculator turns a cabinet opening into cut-ready door dimensions. Enter the opening width and height, choose overlay or inset, and set single or double doors to calculate the finished size before ordering hinges or cutting stock.
Enter the cabinet opening, door style, and spacing. Results update immediately and round to the nearest 1/16 inch.
| Opening | Style | Layout | Each door |
|---|---|---|---|
| 15 x 30 in | Overlay | Single | 16 in x 31 in |
| 30 x 24 in | Overlay | Double | 15-7/16 in x 25 in |
| 36 x 42 in | Inset | Double | 17-13/16 in x 41-3/4 in |
Measure the clear opening width and height in inches. Check the top, middle, and bottom, then use the smallest measurement if the opening is out of square.
Use overlay when the door sits on top of the face frame or box. Use inset when the door sits inside the opening with an even reveal around the edges.
For overlay doors, enter the overlay added on each outside edge. For inset doors, enter the reveal removed from each outside edge. Double doors also need a center gap.
Use the per-door width and height, not just the total pair size. Confirm hinge boring, edge profile, and sanding allowance before final cutting.
For overlay cabinet doors, add the overlay to both sides of the opening width and height. For inset cabinet doors, subtract the reveal from both sides. For double doors, subtract the center gap from the finished width and divide by two.
Common face-frame overlays are 1/2 inch, 5/8 inch, 1 inch, or 1-1/4 inches depending on the hinge. Frameless cabinets often use full-overlay hinges and should follow the hinge maker's overlay chart.
A 1/8 inch center gap is a common starting point for double cabinet doors. Use a slightly larger gap if doors are tall, the cabinet is not square, or seasonal movement is likely.
A 1/8 inch reveal on all sides is common for inset doors. Very precise shops may use smaller reveals, but 1/8 inch gives more tolerance for wood movement and slightly out-of-square openings.
Yes. Measure every opening separately because cabinet boxes, face frames, and old built-ins often vary by 1/16 inch or more. Label each opening and door before cutting or ordering.
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