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Thread Calculator
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Sheet Metal Bend Calculator
Calculate Bend Allowance, Bend Deduction, and Flat Pattern Length.
Inputs
Material & Gauge (Auto-fill)
Custom Thickness/K-Factor
Aluminum 16ga (0.050")
Aluminum 14ga (0.063")
Aluminum 11ga (0.090")
Stainless Steel 16ga (0.060")
Stainless Steel 14ga (0.075")
Steel 16ga (0.060")
Steel 11ga (0.120")
Thickness (in)
K-Factor
Inside Bend Radius (in)
Bend Angle (Degrees)
Leg Length 1 (in)
Leg Length 2 (in)
Calculate
Reset
Formulas used:
Bend Allowance (BA)
= (Angle × π / 180) × (R + K × T)
Outside Setback (OSSB)
= tan(Angle / 2) × (T + R)
Bend Deduction (BD)
= 2 × OSSB - BA
Flat Length
= Leg 1 + Leg 2 - BD
Results
Total Flat Length
0.000"
Bend Allowance (BA)
0.000"
Bend Deduction (BD)
0.000"
Outside Setback (OSSB)
0.000"