During sheet metal bending, the inside bend surface is compressed and the outer surface is stretched. That results in increase of overall sheet length. You can use sheet metal flat length calculator to calculate this change in length. For good understanding, we suggest you to read a detailed article on sheet metal k-factor and flat length calculations.
How To Use This Calculator
Step 1 : Enter Flange Length, Internal Radius and Thickness values
Step 2: Enter K factor value. Use K-Factor Calculator to calculate k factor value.
Step 3 : Value of Bend Deduction and Flat pattern are shown in Result Section.
Keep default values zero.