Compound Mitre Helper

Calculate precise miter and bevel angles for crown moulding, frames, and complex compound joints with cut instructions

Project Settings
Configure your compound mitre project

Interior corner: 90°, Exterior corner: 270°

Angle between wall and ceiling (typically 38° or 45°)

Material & Setup

About this calculator

Compound Mitre Helper: A joinery calculator for miter and bevel settings on angled cuts.

How it works

  • Enter corner angle, spring angle, and stock orientation.
  • Choose saw setup conventions for your workflow.
  • The tool computes miter and bevel settings for accurate cuts.