About this tool
Calculate bend allowance and bend deduction for sheet-metal bends.
BA = θ·π/180·(R + K·T). Bend deduction = 2·(R + T)·tan(θ/2) − BA, with angle θ, inside radius R, thickness T and K-factor K.
Formula: BA = θπ/180·(R + K·T)
Example: Bend angle (°) = 90, Inside radius = 3, Material thickness = 2, K-factor = 0.44 → Bend allowance = 6.0947, Bend deduction = 3.9053.
Typical K-factors are 0.3–0.5; the right value depends on the material and tooling.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Bend Allowance Calculator work?
BA = θ·π/180·(R + K·T). Bend deduction = 2·(R + T)·tan(θ/2) − BA, with angle θ, inside radius R, thickness T and K-factor K.
What should I keep in mind?
Typical K-factors are 0.3–0.5; the right value depends on the material and tooling.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.