Angle & Miter Calculator

Calculate miter and bevel angles for polygons, custom joints, and angle conversions. Get the exact saw setting for any number of sides or angle.

Number of Sides

Common Polygon Presets

Miter Angle

45.00°

Set your miter saw to this angle

Interior Angle

90.00°

4-sided polygon

Exterior Angle

90.00°

Turn angle at each vertex

Bevel Angle

45.00°

Half of interior angle

Miter Saw Setting Summary

To join 4 pieces into a regular 4-sided polygon, set your miter saw to 45.00° from the fence. Each joint consists of two miter cuts that together form the 90.00° exterior angle.

Standard 45° miterThis is the most common miter cut in woodworking — used for picture frames, trim, and box joints. Most miter saws have a detent at 45°.

This calculator provides geometric angle values for reference. Always verify miter and bevel settings with a test cut on scrap material before cutting your workpiece.