Cabinet Door Calculator

The Cabinet Door Calculator finds the exact cut dimensions for a cabinet door based on your opening size and mounting style — useful for woodworkers and DIYers who need precise measurements before cutting. Enter your cabinet opening width and height, then select your number of doors, door style (overlay or inset), overlay amount, reveal/clearance, and gap between doors. You'll get the finished door width, door height, and total door area in square feet.

inches

Inside width of cabinet frame opening

inches

Inside height of cabinet frame opening

inches

How much door overlaps the frame (0.5" partial, 1.25" full overlay)

inches

Gap around door for clearance (0.125" recommended)

inches

Space between double doors (only applies to 2-door configuration)

Results

Door Width

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Door Height

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Total Door Area

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Frequently Asked Questions

What's the difference between overlay and inset cabinet doors?

Overlay doors sit on top of the cabinet frame and cover part of it, while inset doors fit completely inside the cabinet opening. Overlay is more common and forgiving for installation.

What overlay size should I choose for my cabinet doors?

Partial overlay (0.5") is standard for traditional cabinets, while full overlay (1.25") gives a more modern look. The overlay determines your hinge type and affects the door size calculation.

How much clearance should I leave around cabinet doors?

A reveal of 0.125" (1/8") is recommended for most installations. This provides enough clearance for smooth operation while maintaining a clean appearance.

Can I use this calculator for both raised panel and flat panel doors?

Yes, this calculator determines the overall door dimensions regardless of panel style. The calculations work for any cabinet door type including raised panel, flat panel, and Shaker styles.

What if I'm replacing existing cabinet doors?

If you're replacing doors and keeping the same hinges and overlay, you can simply measure your existing doors. Otherwise, measure the cabinet opening and use this calculator for accurate sizing.

How do I measure cabinet openings accurately?

Measure the inside width and height of the cabinet frame opening to the nearest 1/16". Take measurements at multiple points as openings may not be perfectly square.

What's the gap between double doors?

For double doors, a gap of 0.125" between doors is standard. This allows for proper operation and accounts for any slight variations in installation or wood movement.

Do I need different calculations for different wood species?

The basic door sizing remains the same regardless of wood species. However, some woods expand and contract more than others, so you may want slightly more clearance for solid wood doors in humid climates.