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MEASURE ONCE. PLAN YOUR PURCHASE.

Supplied Cabinet Door Overlay calculator.

Calculate equal door leaf dimensions from an opening and overlays or reveals already chosen in your plan.

LUMBER

Your inputs

Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

YOUR ESTIMATE
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Formula and assumptions
BEHIND THE NUMBERS

How this calculation works.

Calculate equal door leaf dimensions from an opening and overlays or reveals already chosen in your plan. Signed overlay or reveal must be supplied. Does not choose hinges or verify installation.

Leaf width = (opening width + 2 side overlays − centre gaps) / leaf count; height = opening height + 2 vertical overlays.Calculated with normalised units

A worked example

Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.

Opening width
1 m
Opening height
0.8 m
Overlay per outside side; negative for reveal
20 mm
Overlay at top and bottom; negative for reveal
20 mm
Equal door leaves
2
Specified centre gap
4 mm

Door leaf width: 0.52 m

Dimensions only. Hinge compatibility, swing clearance, tolerances and mounting are not determined.

Before you purchase

Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.

Signed overlay or reveal must be supplied. Does not choose hinges or verify installation.

Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.

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