Mitre - Precision Angle

A precise, minimal miter angle calculator for woodworking and picture framing.

Mitre calculates the miter angle for any corner cut — whether you're building a picture frame, fitting crown molding, or cutting a custom polygon.

Enter a corner angle directly, or select a polygon by number of sides and Mitre calculates everything for you. Tap the result to copy it straight to your clipboard.

— Direct angle entry for any corner — Polygon mode with presets from triangle to dodecagon — Complementary angle displayed alongside the primary result — Tap to copy the miter angle instantly — No ads, no account, no internet connection required