Compound Miter Calculator

Calculate the precise saw settings for joining two parts at an angle. Perfect for crown molding, tubular frames, or tilted fabrication projects.

°
The total angle between the two joining pieces.
°
The angle the part is tilted from the flat base. Use 0 for flat.
Miter Angle (Saw Scale)
--
°
Turn the saw base
Bevel Angle (Blade Tilt)
--
°
Tilt the saw head
Note: Most chop saws use 0° as the straight cut reference. If your saw uses 90° as straight, subtract these results from 90.
Geometry Reference
The Math Behind the Cut
$\text{tan(Miter)} = \text{tan}(\frac{\text{Corner}}{2}) \cdot \text{cos(Slope)}$
$\text{sin(Bevel)} = \text{sin(Slope)} \cdot \text{sin}(\frac{\text{Corner}}{2})$
Common Applications
  • Square Frames: Corner Angle = 90°, Slope = 0°.
  • Hexagon Frames: Corner Angle = 120°, Slope = 0°.
  • Crown Molding: Corner Angle = 90°, Slope = 38° or 45°.
  • Tilted Hoppers: Variable corner and slope angles.