Enter material, thickness, bend angle, and inside radius. Get K-factor (Machinery's Handbook), bend allowance (BA), bend deduction (BD), outside setback (OSSB), flat blank length, and springback estimate — instantly. Supports up to 5 bends per part.
No signup required — email only for PDF downloadEnter each bend. Leg A = length before the bend; Leg B = length after the last bend.
| Material | Default K (r/t 1–3) |
|---|---|
| mild steel | 0.38 |
| stainless | 0.34 |
| aluminum | 0.41 |
| galvanized | 0.38 |
K-factor varies by r/t ratio. The calculator auto-looks up K from the table based on your inside radius and thickness. You can override per bend in the full tool.
Enter your email to get the full bend deduction report with your inputs, per-bend table, and flat blank calculation. One follow-up email max — unsubscribe any time.
The demo runs the math. The paid tool saves your history, lets you export branded PDFs with your shop name, and includes all 15 IronKit tools for welding and fabrication shops.