Find the miter and complementary bevel for a regular polygonal frame.
| Miter (°) | – |
| Bevel (°) | – |
Use this calculator to set a miter saw for a closed frame with equal sides, such as a picture frame, a regular polygon, or a box with n corners.
Miter angle = 180° ÷ number of sides. Bevel here is the complement 90° − miter, which is the leftover to a square cut. A square frame (4 sides) miters at 45°. There are no length inputs; only the side count matters.
This is a regular-polygon miter. It does not compound a crown-molding spring angle, and it is not a non-equal-sided frame.
Sides: Number of equal sides in the closed shape. Use 4 for a rectangle or square frame, 6 for a hexagon.
Miter: Saw miter setting in degrees.
Bevel: Complement of the miter in degrees (90° minus miter).
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