Bend Allowance Calculator is an offline utility for sheet metal fabrication, repair work, and manual flat pattern layout. Enter material thickness, inside radius, bend angle, K-factor, flange lengths, and related parameters to quickly calculate flat length, bend allowance, and bend deduction, then save common material and process templates. The app supports millimeter/inch switching, quick entry for common angles, reverse calculation, error warnings, local project records, and reusable templates. All data is stored only on your device. No account login is required, no network access is needed, and no user data is collected.
