Dado Joint Calculator

Calculate dado and rabbet joint dimensions and select the right router bit or dado blade setup.

Dado Width
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to match insert material
Dado Depth
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Remaining Material
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Bit/Blade Size
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Number of Passes
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Setup Notes

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Dado Joint Design Rules

Dado Depth = 1/3 to 1/2 of case material thickness

Dado Width = exact thickness of insert material

Plywood Tip

Nominal 3/4" plywood is actually 23/32" (0.7185"). A standard 3/4" dado blade or router bit will be too wide. Use a 23/32" undersized plywood bit, or use shims on your dado blade set.

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