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Free woodworking tool

Screw & Dowel Spacing Calculator

Evenly distribute screws, dowels, shelf pins, or fixing points along a board length using exact edge offsets and clean equal spacing.

Equal spacing Fixed count or spacing limit Exact positions

Plan your spacing

Enter all values in millimetres. You can either choose the exact number of holes you want, or set the largest allowed spacing and let the tool calculate how many holes are needed.

Overall board length in mm.
Distance from the left edge to the first hole centre.
Distance from the right edge to the last hole centre.
Choose whether you want to control the layout by hole count or by a spacing limit.
Use this when you already know how many equally spaced holes you want.

Practical example

If a 720 mm cabinet side needs 5 equally spaced screws with 37 mm offsets from each end, this tool returns the exact centre marks to measure from the left edge.

Good to know

This tool is designed for straight-line equal spacing. It is ideal for fast workshop layout planning, clean repeat drilling, and marking out consistent fixing points before assembly.

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