Miter Angle Calculator
Calculate the miter angle and blade tilt for cutting polygon shapes based on the number of sides.
Miter Angle
Miter angle for regular polygons is calculated from the number of sides.
Miter Angle = 180° / Number of Sides
Interior Angle = (Number of Sides - 2) × 180° / Number of Sides
Common miter angles:
| Shape | Sides | Miter Angle | Saw Setting |
|---|---|---|---|
| Triangle | 3 | 60° | 30° from fence |
| Square/Rectangle | 4 | 45° | 45° |
| Pentagon | 5 | 36° | 36° |
| Hexagon | 6 | 30° | 30° |
| Octagon | 8 | 22.5° | 22.5° |
Miter saw notes:
- Most miter saws measure from 0° (perpendicular to fence)
- A “45° cut” on the saw = 45° miter angle
- For non-standard angles, set the saw to the miter angle value
- Always make test cuts on scrap first