Miter Angle Calculator
Calculate equal miter cuts for a corner or a regular polygon.
Results
Inside angle
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Miter saw angle from square
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Use the result as a planning estimate and verify project-specific measurements, manufacturer information and local requirements where relevant.
How it works
For two equal pieces, the miter setting is half of the change in direction at the joint. For a regular polygon, that becomes 180° divided by the number of sides.
miter = (180° − inside angle) ÷ 2