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Dovetail and Finger Joint Layout Calculator

Calculate evenly spaced repeated joint-feature dimensions and marking references from user-selected geometry.

Prefilled values are examples. Replace them with measurements and current costs for your project.

Inputs

Joint board and repeated features

Range: at least 0.01 in

Range: at least 0.01 in

Range: at least 1

Enter a whole number for a physical joint. Fractional counts are calculated indicatively and flagged.

Range: at least 0.01 in

Margins and side slope

Range: at least 0 in

Range: at least 0

Enter 0 for square finger joints. For example, a 1:6 side slope is 1/6 (about 0.166667); choose the slope for your own layout.

Result

Clear gap between adjacent features
2.2500 in
Feature width at board back
1.2500 in
Repeat pitch
3.2500 in
First feature center from board edge
0.7500 in
Last feature center from board edge
7.2500 in
Side flare at each edge
0.1250 in
Width between edge margins
7.5000 in
Layout fits the entered width. Confirm the mating-board convention before cutting.
Whole feature count.

Formula

Clear gap between adjacent features
—
Repeat pitch
—
Side flare at each edge
—
Feature width at board back
—

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Results are planning aids based on the inputs and assumptions shown. Verify dimensions, stock sizes, hardware clearances, kerf, and current prices against your project before cutting or quoting.