Calculate the amount of material needed to accommodate a bend in sheet metal.
Material & Geometry
in
in
°
Calculation Results
Enter parameters to calculate
About this calculator
Quick Reference
ABend angle in degrees
RInside bend radius
KK-Factor (neutral axis offset)
TMaterial thickness
Overview
Bend Allowance is the length of the neutral axis between the bend lines. It is essential for determining the flat length of a sheet metal part before bending.
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Pro Tips
The K-Factor depends on the material type and bending method (standard is often 0.33 to 0.50).
The neutral axis is the layer of material that does not change length during bending.
Angle should be the internal angle of the bend.
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Fun Facts
"Soft materials like aluminum have different K-factors than hard materials like stainless steel."
"If the bend radius is much larger than the thickness, the K-factor approaches 0.5."
"Precision sheet metal fabrication uses Bend Deduction and Bend Allowance to ensure final dimensions are accurate."
