Triangle box (any three sides)Custom sizeSVG · PDF · DXF · AIkerf compensated
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About the BoxTri generator
BoxTri takes three side lengths and builds a triangular box from them. Enter three equal sides for an equilateral box, two equal sides for an isosceles one, or three different sides for a scalene box — handy for corner shelves, planters and display pieces.
What you can adjust
Outside or inside measurements, so the box fits the space — or the contents.
Material thickness from presets or a custom value, plus your machine's kerf.
Finger joints or flat, glued edges, with a target tooth width you can change.
A 3D preview you can spin, and a flat cutting plan with every panel named.
How it goes together
If the three sides cannot form a triangle, the generator falls back to an equilateral box so you always get a usable file. Each wall is cut as a straight panel and the corners are glued; the base and lid hold the shape.
Tips for a clean cut
Acute corners leave less room for the wall tabs. On a very sharp triangle, use a thicker base plate or glue the walls to a solid base without slots.
Frequently asked questions
Can I work in inches or centimeters?
Yes. Switch between mm, cm and inches at the top of the panel. Material thickness and kerf are always entered in millimeters.
Which file formats can I download?
SVG, PDF and DXF — all at 1:1 scale, in millimeters. AI files read the SVG or DXF straight into Illustrator.
What does the “Try other dimensions” button do?
It fills in a different set of measurements so you can see how the design changes before you enter your own.
What happens if my three sides cannot form a triangle?
The generator tells you and falls back to an equilateral triangle with the longest side you entered.