K-factor calculator
Find the neutral-axis K-factor and the bend allowance from thickness, inside radius and angle — with typical K values by material.
Open tool →Bend allowance & deduction
Compute bend allowance (BA), bend deduction (BD) and outside setback (OSSB) for a bend, with every formula shown.
Open tool →Flat / blank length
Get the developed flat length of a multi-bend part from its outside leg lengths using the bend-deduction method.
Open tool →Gauge → thickness chart
Convert gauge to thickness in mm and inches for standard steel, galvanized, aluminium and stainless — filterable.
Open tool →Built by Bendline
Unfold STEP parts to DXF in your browser. Upload a 3D part, preview the flat pattern, and download a cut-ready DXF — preview and unfold are always free.