Bend Allowance Calculator
This bend allowance and flat-pattern calculator supports inputs for material thickness, inside radius, bend angle, an...

What Bend Allowance Calculator does
The Yang Tool bend allowance calculator determines the bend allowance and flat-pattern dimensions needed for sheet metal fabrication. Users input material thickness, inside radius, bend angle, and K-factor, with optional leg lengths to compute total flat length. The tool presents the underlying bend allowance formula and practical guidance, making it suitable for planning and preparing flat patterns before cutting. It is accessible online at no cost and requires no subscription to use.
How to use the Yang Tool Bend Allowance Calculator
- 1
Enter the material thickness in the designated field
- 2
Input the inside radius and bend angle for the specific bend
- 3
Provide the K-factor or let the tool apply a default value
- 4
Add optional leg lengths if a total flat-length output is desired
- 5
Review the calculated bend allowance and flat-length results displayed on screen
Best for
Fabricators and DIY builders who need quick, free flat-pattern calculations without installing software or paying for premium tools.
Limitations
- Results are estimates based on input values; real-world factors like tooling and material grain are not accounted for
- No unit switching available; inputs and outputs default to metric or imperial depending on site settings
- Lacks advanced material databases or save/export functions found in paid engineering software
Bend Allowance Calculator FAQ
- Can the Yang Tool bend allowance calculator handle different material types?
- Yes, users enter the material thickness and K-factor; the calculator applies the bend allowance formula regardless of specific metal type, though results are estimates based on the values provided.
- Is the bend allowance result adjustable if I change the bend angle?
- Changing the bend angle updates the bend allowance and flat-length outputs instantly, allowing users to compare different bend scenarios before committing to fabrication.
- Does the tool require an internet connection to function?
- As a web-based calculator on yangtool.com, it requires an active internet connection to access and run the tool.
- Can I save or print the bend allowance results from Yang Tool?
- The interface does not include built-in save or print functions; users can copy the displayed results or take a screenshot for their records.
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