Wood Joint Explorer
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Tongue and groove joint Workbench

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Tongue and groove joint marked out — the state the viewer opens from: layout lines scribed, no waste removed yet.
Construction
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Parts

Drag to rotate. Right-drag to move. Middle-drag to zoom; wheel zoom needs Rotate on. Double-click to refit.

Tap Rotate, then drag to rotate. Two fingers move or zoom. Double-tap to refit. Turn Rotate off to scroll from the stage.

Parameter controls need the 3D renderer; this device shows the drawn defaults.

Geometry
18 mm11/16 in
110 mm4 5/16 in
33% of the board's thickness
7 mm1/4 in
groove 0.6 mm deeper than the tongue
Wood tone

Readouts

Glue area
4170 mm²6.46 in²
Parts
2
Cuts
3
Units

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Cut list, finished sizes at the current settings
PartWidthThicknessCutsDeepest cut
Tongued board117 mm4 5/8 in18 mm11/16 in26.03 mm1/4 in
Grooved board110 mm4 5/16 in18 mm11/16 in17.6 mm5/16 in

Board length along the grain is a display convention in the model and is not listed.

About this joint

A tongue and groove joint (matched boarding) leaves a centred tongue along one board's edge and a matching channel along the next, so the boards engage along their whole length. The joint keeps the faces level and closes the line while still letting each board move across its width.

Read the Tongue and groove joint guide