How to use miter angle layout
What this calculation does
A symmetric joint divides its direction change between two matching miters; a regular polygon uses the same setting at each end.
Choose a two-piece joint or regular polygon mode, then enter its interior angle or number of equal sides.
Enter the measurements
- Layout method: Choose a two-piece joint angle or an equal-sided regular polygon.
- Interior angle between two pieces: For a joint, enter the inside angle between pieces.
- Equal sides in polygon: For a polygon, count its equal sides.
Formula and variables
Symmetric two-piece joint: each miter = (180° − interior angle) ÷ 2. Regular polygon: each miter = 180° ÷ number of sides.
For a joint, each miter is half of 180 degrees minus the interior angle. For a regular polygon, each end miter is 180 degrees divided by side count.
Read the result
A six-sided regular polygon uses a 30 degree setting from square at each segment end.
Worked example
Inputs: Six equal sides in a regular polygon frame
- Miter setting = 180÷6.
- Each end is cut at 30° from square.
Expected result: 30° miter setting on each end
Frequently asked questions
Does the result include blade calibration?
No. Confirm the setting with a test cut and the saw scale convention.
Does the joint mode calculate a bevel?
No. It returns a symmetric miter setting only.
Conditions, presets and technical notes
Assumes equal, symmetric miters and a regular polygon when that mode is selected. It gives a geometric saw setting, not a compound bevel, cut-length list, or machine calibration.