Construction

Angle Cut Calculator

Find the miter cut angle for two boards meeting at a corner.

Calculated Output

Miter cut per board (°) 45

Formula: miter = (180 − joint angle) ÷ 2

Step-by-Step Breakdown

1. Values used:

2. Joint angle = 90 degrees

4. Miter cut per board = 45°

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The math behind it

miter cut = (180 − joint angle) ÷ 2. A 90° corner needs 45° cuts.

90° corner → 45° per board.

Not a 90° corner?

This formula handles any angle — each board gets half the complement.