Bending and Flat Patterns

These tools help you size a formed part. Estimate the K-factor and inside radius, use them for the bend allowance and bend deduction, and get the flat pattern for a cone or truncated cone.

Tools in this group

• Bend Allowance Calculator — Enter thickness, inside radius, angle and K-factor to get the bend allowance, bend deduction and the flat length of your part.
• Cone Flat Pattern Calculator — Enter the two diameters and the height of a cone or truncated cone to get the flat pattern: radii, sector angle and a template to download.
• K-Factor Calculator — Estimate the sheet metal K-factor from thickness, inside radius and bending method, or work it out from a test bend.
• Sheet Metal Bend Radius Calculator — Estimate the inside radius an air bend will give with your V-die, the minimum radius a material can take, or convert inside and outside radius.