# Bend Allowance Calculator

- Canonical URL: https://www.ahner-industrial.com/bend-calculations
- Page type: webpage
- Updated: 2026-08-07

Look up Ahner shop tooling data, bend deduction, K-factor, tonnage, and minimum flange length for sheet metal planning.

## Published shop-data coverage

- Materials: Carbon steel - 1.0038; Stainless steel - 1.4301
- Thicknesses: 0.03 in (22Ga); 0.04 in (20Ga); 0.05 in (18Ga); 0.06 in (16Ga); 0.075 in (14Ga); 0.1 in (12Ga); 0.12 in (11Ga); 0.14 in (10Ga); 0.18 in (7Ga); 0.25 in (3Ga)
- Bend angles: 90 degrees; 75 degrees; 60 degrees; 45 degrees; 30 degrees; 20 degrees; 15 degrees
- Bottom-die options: KEV W8/30 (OZU-051 - 55); EV005 W16/30 R3 (OZU-353 - 85); EV W20/84 R2; EV007 W24/30 R2.5 (OZU-354 - 86); EV W40/30 R5 (OZU-329 - 61)

## Calculator outputs

For a supported material, thickness, and bend-angle combination, the calculator reports inside radius, bend deduction, calculated K-factor, bottom die, estimated press tonnage per inch, and minimum outside flange length.

K-factor is calculated from inside radius and bend deduction using the neutral-axis location divided by material thickness.

## Planning note

These shop-data results are a starting point. Confirm material, grain direction, tooling, radius, and a test bend before production release.

[Open all fabrication reference tools](https://www.ahner-industrial.com/ref-info)
[Use bend data in a forming review](https://www.ahner-industrial.com/contact?project=Forming#quote-form)

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