Measure the real corner
A wall that looks square may be 89° or 91°. Enter the angle you actually measured.
Free contractor tool
Crown Molding Angle Calculator
Turn the measured corner and crown spring angle into the miter and bevel settings for a flat compound cut.
38° / 45° / 52°Odd cornersMiter + bevel
Compound crown settings
Measure the actual wall corner, choose the crown spring angle and read the saw settings for cutting the molding flat.
Corner type
Always make a scrap test. Real corners are often a degree or two off square, and saw orientation depends on which piece and which side of the corner you are cutting.
Quick reference
Spring angle changes the cut
Common crown profiles use 38°, 45° or 52° spring angles. The flat-cut miter and bevel change with the profile.
Scrap test first
The numbers solve the geometry. Use a short test piece to confirm saw orientation and which edge becomes the long point.