About this tool
A finger-jointed box is the classic first project for laser cutters: the sides interlock like fingers and hold with a little glue or even without. The generator creates all parts as an SVG file, suitable for plywood, MDF or acrylic.
You enter inside or outside dimensions, material thickness and finger width. The number of fingers per edge is chosen to be odd so the corners close cleanly. With the kerf, all outlines grow by half the cut width so the joints do not wobble. Optionally the box gets a lid.
How it works
- Enter width, depth and height and choose inside or outside dimensions.
- Enter the measured material thickness, the finger width and your laser’s kerf.
- Check the preview and download the SVG file.
- Import it into your laser software at 100 % size and cut the parts.
Frequently asked questions
How do I find the right kerf?
Cut a test piece and measure it; the Kerf Calculator calculates the kerf from it. For a first attempt, 0.1 to 0.2 mm often works on diode and CO2 lasers.
Why is the number of fingers always odd?
With an odd number, every edge starts and ends the same way, with a finger or with a gap. That way opposite sides fit together and every corner is filled by exactly one part.
What do inside and outside dimensions mean?
With inside dimensions the usable space is as large as entered and the box grows by twice the material thickness on the outside. With outside dimensions the box fits exactly into a given space.
Which laser settings do I need?
That depends on the laser and material. With the Laser Test Grid Generator you cut or engrave a grid with different powers and speeds and see which combination cuts through.