bend allowance calculator for sheet metal mm 3 mm stainless
Free calculate the length of material needed to accommodate a bend in sheet metal fabrication. Get instant, accurate results with our easy-to-use calculator.
Input Parameters
Inside radius of the bend
Typical: 0.3-0.5 (0.5 for most materials)
Results
Enter parameters to calculate bend allowance
Bend Allowance Formula
Formula
BA = θ × (π/180) × (R + K×t)
Where:
- • BA = bend allowance (mm)
- • θ = bend angle (degrees)
- • R = inside radius (mm)
- • t = material thickness (mm)
- • K = K-factor (0.3-0.5)
K-Factor Values
- • Soft materials: 0.3-0.4
- • Medium materials: 0.4-0.5
- • Hard materials: 0.5-0.6
- • Typical: 0.5