Ron  Leigh's
BEND  ALLOWANCE  Calculator

Please read Bend Allowance Formulas to understand how this calculator works.




Select  
material  
  hardness  

Soft – soft copper, soft brass, etc.
Medium-hard – soft steel, aluminum, etc.
Hard – CRS, spring steel, hard copper, bronze, etc.

Material thickness: (inches or millimeters)
Inside radius: (same units as thickness)
Bend angle: (degrees)