Miter Angle Calculator

Standard Miter Joint

Select a shape preset or enter the number of sides / corner angle.

Number of Sides

Corner Angle (°)

Miter Angle

degrees

Blade Tilt

degrees

Corner Angle

degrees

Formulas:
Corner Angle = (n - 2) × 180 / n
Miter Angle = 180 / n (or Corner Angle / 2 from 90°)
Blade Tilt = 90 - Miter Angle

Compound Miter (Tilted Joint)

For joints that tilt away from vertical (e.g., planters, crown molding).

Corner Angle (°)

Slope / Tilt (°)

Miter Saw Angle

degrees

Bevel Angle

degrees

Compound Formulas:
Miter = arctan( sin(slope) × tan(corner/2) )
Bevel = arctan( cos(slope) / tan(corner/2) )
Slope = 0° means vertical (no tilt).