How to use this tool
- Enter your values or try the example.
- Run the tool and check the result.
- Save the result where a download is available.
Supported features & limits
Open-top rectangular box, outside dimensions 20–1000 mm. Material thickness 1–20 mm. Finger width is a target: each edge uses an odd number of equal sections for matching joints, at least twice the material thickness. Bottom owns all corner cubes; vertical joints begin above the bottom. No lid, kerf compensation, clearance, sheet nesting or strength calculation. Apply kerf in CAM and verify a fit sample before the full cut.
What happens to my files?
Your entries are processed locally and are not sent to our server. Reset clears the result and restores initial form values. Downloads remain on your device.
Maintained by Roman Zmazhenko. Updated 1 November 2026.