About CrownMiter
CrownMiter is a free tool built around one idea: the saw settings for crown molding should be right, even when the corner is not square. Cutting crown is simple in principle and easy to get wrong in practice, so we built a calculator that does the compound-miter math the careful way.
What we make
One tool, free and running entirely in your browser. The crown molding angle calculator takes the angle of your corner and the spring angle of your molding and returns the exact miter and bevel to set on the saw, with a diagram showing how to lay the molding down and a printable cut sheet.
Why we care about the numbers
Crown molding is a compound cut. The molding sits at an angle to both the wall and the ceiling, so the joint needs the saw table rotated to a miter and the blade tilted to a bevel, both at once. The common instinct, a flat 45 degree miter, never closes the seam. And because most real corners are a degree or two off square, a printed chart of standard angles only covers the easy case.
So we wrote the standard compound-miter relations and checked them against the settings every reference and saw detent gives. A 38 degree spring crown on a square 90 degree corner returns a 31.6 degree miter and a 33.9 degree bevel, exactly as the woodworking sources publish. The same formulas then handle the odd corners the same way, which is the whole reason the tool exists.
What we do with your data
Nothing leaves your browser. The calculator runs locally, there is no account, and we do not collect your measurements. If you send a message through the contact form, we store it so we can reply, and that is all. Our privacy policy spells out the details.
A note on trust
These settings are a strong starting point, not a promise of a perfect joint. Walls move, corners drift, and molding profiles vary. Always make a test cut on a scrap, dry-fit it, and nudge the miter half a degree if you see a gap before you run a full length. We tell you the assumptions behind every result, so you know what to verify.
Try the calculator or read the guides to get started.