Construction · cabinetry

Cabinet door size & overlay calculator.

Enter the opening and the overlay or reveal you want. Get finished door sizes in fractional inches and a cut list.

Opening and doors

Door style

Doors per opening

Cabinet construction

Opening width (in)

Opening height (in)

Left overlay (in)

Right overlay (in)

Top overlay (in)

Bottom overlay (in)

Center gap between the pair (in)

Number of identical openings

Round to nearest

Hinge rule (optional)Each line means “door height up to this many inches takes this many hinges.” Copy it from your hinge maker’s chart. Nothing is pre-filled because the rule depends on door weight, material and hinge.

Door size and cut list

How the sizes are calculated

Overlay door: width = opening width + left overlay + right overlay; height = opening height + top overlay + bottom overlay.
Inset door: width = opening width − left reveal − right reveal; height = opening height − top reveal − bottom reveal. A common reveal is 1/8″ per side.
Pair of doors: each door width = (total width from the formula above − center gap) ÷ 2. Height is unchanged.
Hinges: the count comes only from the rule you type in, compared with the finished door height. This page does not hard-code a manufacturer table.

Overlay, reveal and construction type

Overlay is how far the door covers past the edge of the opening; reveal is the visible gap between a door and its neighbour or the frame. Face-frame cabinets have a frame on the front, so the opening is the frame opening and overlay is measured from the frame edge. Frameless (European-style) cabinets have no frame, so the opening is the carcass interior and overlay is measured from the side panel or shelf edge. The arithmetic is the same for both; only where you measure changes. For the overlay a given hinge produces, follow the hinge maker’s data, not a default.

Results are rounded to the nearest fraction you choose, and the decimal value is shown alongside. Confirm the sizes against your hardware, door thickness and shop tolerances, and cut a test door first.

Sources

Formulas: TWC Industrial cabinet door calculator (single overlay, split overlay with 1/8″ center gap, inset with 1/8″ clearance per side), checked September 30, 2026. Overlay and reveal definitions: Blum concealed hinge brochure. Everything runs in your browser and nothing is sent anywhere.