📐 Sheet Metal Bending Calculator
Enter material thickness, bend radius, K-factor, leg lengths, and bend angles. The tool will calculate flat length, bend allowance (BA)ℹ️, and bend deduction (BD)ℹ️.
👉 Enter values above to see results here
Frequently Asked Questions
What is Bend Allowance (BA)?
Bend Allowance is the length of material needed to make a bend. It accounts for the stretching of the inner and outer surfaces of the sheet during bending.
What is Bend Deduction (BD)?
Bend Deduction is the amount subtracted from the total length of the flat sheet to account for the bends. It helps ensure the part dimensions are accurate after bending.
What is the K-Factor in sheet metal bending?
The K-Factor is the ratio that defines the location of the neutral axis of the bend. It typically ranges between 0.3 and 0.5 depending on material and tooling.
How do I calculate flat length of sheet metal?
Flat length = Sum of all leg lengths − Total Bend Deductions. The calculator above does this automatically for you.
Can this calculator be used for different materials?
Yes. The formula works for any sheet metal material. You just need to adjust the K-Factor based on your material properties and tooling.