Bend Allowance Calculator

Calculate bend allowance, setback, and flat blank length for aircraft sheet metal fabrication.

Material Preset

Use Outside Mold Line (OML) radius

Bend Angle (°)

Inside Bend Radius (in)

Material Thickness (in)

K-Factor

Leg 1 Length (in) optional

Leg 2 Length (in) optional

Enter bend angle, radius, and thickness to calculate

Important Disclaimer

This tool is provided for educational and reference purposes only. Always verify all calculations against FAA-approved maintenance manuals, aircraft documentation, and applicable regulations. Never use web-based tools as the sole basis for airworthiness decisions.