Chamfer Calculator

GEOMETRY & SHOP MATH

Chamfer calculator converts a target chamfer angle and one known leg (depth or width) into the other leg, for programming an edge break or bevel.

Width (Face Leg)—
Chamfer Length (Hypotenuse)—
Included Angle (Both Sides)—
Angle is measured from the flat face to the chamfer cut. A 45° angle gives equal legs (depth = width).

How it works

A chamfer cut forms a right triangle where the two legs are the axial depth and radial width of the cut, connected by the chamfer angle measured from the flat face. At exactly 45°, depth and width are equal; any other angle makes the triangle uneven, so knowing the angle and one leg is enough to solve for the other.

FAQ

What’s a typical chamfer angle and size? 45° by 0.010 to 0.030 in is a very common general-purpose edge break; sharper functional chamfers, like lead-ins for threads or press fits, often use 30° or 60° depending on the mating part’s requirements.

Related Guides

CNC Calculators · Thread Turning Calculator · Right Triangle Calculator

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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.