Home / Joinery & Furniture Engineering / Compound Miter Solver
Vriksai Timber Intelligence

Compound Miter Solver

Solve miter table angle and blade bevel for crown moulding, hip rafters and polygon frames. Enter corner angle + spring/tilt — get precise saw settings.

Crown MouldingHip RaftersPolygon FramesAngled CeilingsPDF Report
📐

Compound Miter — Solver

Solve miter table angle and blade bevel for crown moulding, hip rafters and polygon frames. Enter corner angle + spring/tilt — get precise saw settings.

Quick Presets — Click to Load
Application & Inputs
Application Type
Polygon Sides (polygon mode)
sides
Corner / Wall Angle
°
Spring / Tilt Angle
°
Crown: angle from vertical (38° or 45° standard). Flat frame = 0°.
Roof Pitch (hip rafter)
Compound Miter Solution
Miter Angle (Table Rotation)
Rotate saw table to this angle
Bevel Angle (Blade Tilt)
Tilt blade to this angle
°
Miter (precise)
°
Bevel (precise)
°
Dihedral Angle
°
True Angle
Formula Trace

📐 Compound Miter Solver

Calculates the two simultaneous saw settings needed when cutting wood angled in two planes at once. Crown moulding is the classic example — it leans from the wall at a spring angle while running along the wall-ceiling junction. Both miter table angle AND blade bevel must be set together for a perfect fit.

Where Used?

Crown MouldingHip RaftersPolygon FramesDecorative TrimAngled CeilingsTimber Framing

Formulas

Miter = arctan( sin(S) x tan(C/2) ) [S = spring, C = corner angle]Bevel = arcsin( cos(S) x sin(C/2) )Dihedral = arccos( cos2(S) x cos(C) + sin2(S) )Polygon corner = 180 - (360 / N_sides)

FAQ

What is a compound miter?
A cut angled in two directions simultaneously — the saw table rotates (miter) AND the blade tilts (bevel) at the same time. A simple miter only rotates the table. Crown moulding requires both set together.
What is the spring angle for crown moulding?
How far the moulding leans from vertical — the angle between the moulding back and the wall. Standard profiles come in 38° and 45° spring angles, usually printed on the moulding packaging.
ResourcesView the formulasFormula Library