Miter Angle
Use the Miter Angle for woodworking planning. Enter Number of sides to get a clear result, formula explanation, and practical checks.
Miter Angle measurements
Enter your values, then calculate.
Result
How to calculate miter angle
This calculator finds the correct miter angle for a shape with a given number of equal sides — useful for cutting frames, boxes, or any multi-sided project with consistent corner angles.
How the calculation works
Miter angle = 180 ÷ Number of sides. This gives the angle each miter cut should be set to, based on the interior geometry of a regular polygon.
Example
A standard 4-sided (rectangular) frame: Miter angle = 180 ÷ 4 = 45°, the familiar 45-degree miter used for square and rectangular frames.
Frequently asked questions
How is Result calculated?
Result = 180 ÷ [Number of sides].
Is the Miter Angle free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Miter Angle
Miter angle = 180 ÷ Number of sides. This gives the angle each miter cut should be set to, based on the interior geometry of a regular polygon.
Let's understand your miter angle result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Miter Angle
- This formula works for any regular (equal-sided) shape — a hexagonal (6-sided) frame needs 180 ÷ 6 = 30° miters, for example.
- Cut a test piece first to confirm your saw's angle setting produces a tight-fitting joint before committing to your final workpieces.
Common Miter Angle Mistakes to Avoid
- Confusing the miter angle (the saw blade angle) with the resulting corner angle of the finished joint, which is a different (though related) number.
When to Use This Calculator
This calculator finds the correct miter angle for a shape with a given number of equal sides — useful for cutting frames, boxes, or any multi-sided project with consistent corner angles.