What this template is for
A cone or funnel whose ends are cut at an angle instead of square. Funnels into a slanted opening, taper pieces for ducting, horns and model parts.
Also called angled cone · funnel template · oblique cone · cone transition — all the same shape, and this is it.
- Funnels with a slanted mouth
- Tapered duct and hopper transitions
- Model and prop parts
- Sheet metal pattern development
How to use this template
Set your measurements above, then download the file that suits whatever you are already working in. All four are the same mitered cone, drawn to the same size — only the format changes, and every one of them is free.
- PDF printing at home
- Print it at 100 per cent and cut it out. This is also the file to hand a print shop: say "actual size, no scaling".
- PNG 300 dpi Canva, Photoshop, Procreate
- Upload it as an image, lock it in place, and design your mitered cone on top of it. Works on the free Canva plan and on a phone. Full Canva walkthrough →
- SVG Cricut, Illustrator, Inkscape, Affinity
- Vector, with the cut lines, fold lines and labels on separate layers so you can style or delete them independently. Cricut and Silhouette walkthrough →
- DXF Silhouette, laser and vinyl cutters
- Two layers, CUT and FOLD. The free Silhouette Studio Basic opens DXF where it will not open SVG, so this is the one to use there.
Putting your own design on it: you do not need any of those programs for a logo or a pattern — add a picture in the panel above and drag it onto the mitered cone. It is trimmed to the cut outline and embedded properly in the PDF, and it never leaves your computer. Getting it printed properly →
Printing it
- Type the size you need above, in millimetres, centimetres or inches.
- Download the PDF and print it at 100% — never “fit to page”, or every measurement comes out wrong.
- Too big for your paper? Tick Split across several sheets and it prints across as many as it needs, with overlaps and matching letters to tape together.
How to put it together
These pictures are the mitered cone itself, not a generic diagram — change the measurements above and the template changes, but the three steps never do.
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Cut the solid lines
Every solid line is a cut. Scissors are fine; a craft knife against a steel rule is neater on the straight runs. Cut the inside shapes, like a thumb hole, before you free the outline — the sheet is easier to hold while it is still whole.
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Score every dashed line
Dashed lines are folds, and they want scoring first: run an empty ballpoint, a bone folder or the back of a butter knife along a ruler. Card folded without scoring cracks along the outside of the bend. Fold each crease both ways, then back — it makes the shape almost close itself.
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Fold, glue and hold
Roll it up and glue the lap, working from the wide end. The two curved edges are not circles — do not try to true them up with a compass.
Glue: a glue stick is enough for paper; use white PVA on card and hold each seam for thirty seconds. Tape works on the inside of any seam if you would rather not wait. Let a box dry standing up, not lying on a flap.
Questions about the mitered cone
- Why are the edges not circular arcs?
- Because a flat cut across a cone does not unroll into a circle. The slant distance from the apex stretches and shrinks round the rim, so both edges are worked out one step at a time. Do not try to true them up with a compass.
- Why did the tool change my angle?
- Either the cut was steeper than the cone wall itself, which would fold the rim back past the apex, or on a flat cone it sliced out past the other end. The tool eases the angles back until both rims stay clear and says what it used.
- Can I use this for metalwork?
- The geometry is the same pattern development a sheet metal worker would draw. Export the DXF, allow for your own seam and bend radius, and it transfers straight onto the sheet.
Print your own design on it
Every template here takes your artwork. Add a picture in the panel on the left — a logo, a photo, a pattern — drag it where you want it on the mitered cone, and it prints with the template. It is trimmed to the cut outline automatically, so nothing spills over the edge, and it goes into the PDF as a properly embedded image.
No other free box template site will do that, and your picture never leaves your computer — there is no server here to send it to.