Joinery Angle Calculator

Calculate miter and bevel angles for polygon miters and compound joints. Enter the number of sides and optional tilt angle to find exact saw settings.

Inputs

Number of Sides

Tilt Angle

Tab to move between fields

Results

Miter Angle

30°

Miter Saw Setting

60°

Interior Angle120°

Compound Miter30°

Compound Bevel0°

How to Use This Calculator

Enter Number of Sides and Tilt Angle.
Review Miter Angle (°) and Miter Saw Setting (°).
Use Interior Angle (°) and Compound Miter (°) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Number of Sides

Number of Sides	Miter Angle	Miter Saw Setting
5.1	35.29°	54.71°
10	18°	72°
17	10.59°	79.41°
22	8.18°	81.82°

What each input means

Number of Sides: Number of sides for the polygon (e.g., 4=square, 6=hexagon, 8=octagon)
Tilt Angle: Tilt angle in degrees for compound miters (0 for flat miters)

How this is calculated

Worked example, using the default values

Identify Input Parameters
Number of Sides = 6, Tilt Angle = 0 = 2 input(s) provided
Calculate Miter Angle
Miter Angle
30 = 30
Calculate Miter Saw Setting
Miter Saw Setting
60 = 60
Calculate Interior Angle
Interior Angle
120 = 120
Calculate Compound Miter
Compound Miter
30 = 30

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