How to Measure for Arched Cabinet Doors | Opening-First Sizing

Measure the cabinet opening, not the old door, then add overlay and subtract door gap to get the finished arched door size.

Getting the measurement right for arched cabinet doors comes down to one habit: ignore the old door and start from the cabinet opening. Replacement arched doors are sized the same way as standard ones — you measure the opening, add overlay for the hinge and reveal, then adjust for the gap between double doors. Here is the full process, plus the mistakes that throw off more orders than anything else.

Start With The Cabinet Opening, Not The Old Door

Arched cabinet doors are measured from the cabinet opening, never from the door you are replacing. The old door may have been trimmed, swollen from humidity, or simply not original to the cabinet — any of those makes it an unreliable template.

For single doors, that means measuring the opening top to bottom and side to side, then adding the overlay you want on every edge that meets a frame. Most frameless or standard overlay installations use a 1/2-inch overlay, which works out to adding 1 inch to the opening width and 1 inch to the opening height.

How To Size Double Doors With A Door Gap

Double arched doors need one extra step: account for the reveal between the two doors. That gives you the total finished width for both doors combined.

From that combined width, subtract the door gap, then divide by two. The gap keeps the two doors from rubbing as wood expands and contracts with humidity, so it is not optional clearance.

Pick one gap size and stay consistent; either works, but mixing them produces a mismatched pair.

Measuring Mistakes That Ruin Arched Door Orders

Every major cabinet-door manufacturer lists the same handful of errors as the top causes of wrong-sized orders. Read through these before you measure, then check your numbers against them:

• Measuring the old door instead of the cabinet opening — the single most common error, and it cascades into every other dimension.
• Skipping the overlay calculation — a door sized to the opening exactly will not cover the frame or hinge mounting area.
• Forgetting the door gap on double doors — without the 1/16- or 1/8-inch reveal, the doors bind against each other.
• Rounding to the nearest 1/4 inch — cabinet openings are rarely square; measure to the nearest 1/16 inch so small variations do not compound.
• Measuring once — check the width at the top, middle, and bottom, and the height at both sides. Uneven openings need the smallest measurement, not the largest.
• Measuring the outside of the box — always measure inside the opening or between the inside edges of the face frame, per Lowe’s method of inside-edge-to-inside-edge.

If your opening is out of square by more than the tolerance you planned for, address the frame first. A door cannot fix a crooked cabinet.

Arched Clearance And Frame Expansion Tolerance

Arched doors have one requirement flat doors do not: expansion tolerance around the arch itself.

The principle carries over to any arched door: the curved edge needs breathing room because wood movement is not uniform along a radius. Tighter clearance looks better in the showroom but binds in a humid kitchen, so follow the manufacturer’s tolerance for your specific frame material.

Once you have your final width and height written down, re-check the numbers twice against the opening — and when you are ready to order, a curated roundup of top-rated arched cabinet doors can help you match a style to the dimensions you just captured.

Measure to the nearest 1/16 inch, write down every number before you order, and verify once more that your arch profile matches the tolerance spec. That sequence is the difference between a door that drops in and a return shipment.