Bend Allowance Calculator

About

Setting up a press brake job and need the bend allowance, deduction, or flat blank length before you cut? Getting it wrong wastes material and time. This calculator computes BA, OSSB, BD, and flat blank from your K-factor, material thickness, bend radius, and angle. Enter material thickness, inside bend radius, bend angle, and K-factor (or use presets for mild steel, aluminum, stainless). Get bend allowance, bend deduction, outside setback, and total flat blank length. WHAT IT CALCULATES: - Bend Allowance (BA) - Bend Deduction (BD) - Outside Setback (OSSB) - Flat blank length for single and multi-bend parts - Arc length of the neutral axis K-FACTOR PRESETS: - Air bend, bottom bend, coining - Mild steel, aluminum, stainless steel - Custom K-factor entry KEY FEATURES: - Multi-bend flat pattern layout - Standard K-factor presets - Metric and imperial units - Works completely offline - No account or login required Built for sheet metal fabricators, press brake operators, and mechanical engineers.