AppPage.net
Sheet Metal Bend Allowance icon

Sheet Metal Bend Allowance

ToolToolNam Tools Contains ads

Bend allowance calculator with K-factor, bend deduction and flat pattern length

Price
Free
No in-app purchases
Updated
Oct 2
2026 · v1.0.0
Get it onGoogle Play See alternatives

Screenshots

  • Sheet Metal Bend Allowance screenshot 1
  • Sheet Metal Bend Allowance screenshot 2
  • Sheet Metal Bend Allowance screenshot 3
  • Sheet Metal Bend Allowance screenshot 4
  • Sheet Metal Bend Allowance screenshot 5

About Sheet Metal Bend Allowance

A sheet metal calculator for the flat pattern of a bent part. Enter thickness, inside radius, bend angle and K factor, and get bend allowance, bend deduction, outside setback and the flat length before you cut — with a profile diagram that shows exactly which dimensions you entered.

Built for sheet metal shops, HVAC duct fabricators and anyone who runs a press brake and is tired of redoing the math on scrap paper.

Key Features

- Bend allowance calculator: BA = θ × (R + K × T), with outside setback and bend deduction shown next to it.
- Single bend, L, U and Z profiles: enter outside flange dimensions and get the flat length with every bend deduction applied.
- Outside dimensions made clear: the diagram labels each flange as an outside (outer mold line) dimension, so inside and outside measurements don't get mixed up.
- Bend direction on the drawing: U channels bend the same way twice, Z profiles bend up then down — both show on the profile and on the flat pattern.
- Flat pattern with bend lines: see where each bend line falls from the left edge of the blank for layout.
- K-factor starting values: pick aluminum, mild steel or stainless and a starting K is filled in from the R/T ratio. Enter your own K when you have tested it.
- Cut length rounded up: the exact flat length and a rounded-up cut length (0.5 mm or 1/32 in) are shown separately.
- Project parts list: add parts with quantities, duplicate or delete them, and copy the whole list with the inputs behind each line.
- mm or inches: switch units at any time; comma decimals work too.
- Recent projects: save up to 20 projects on the device and reopen one as a new job.

Recommended For

- Press brake operators checking a blank size before cutting
- HVAC and duct fabricators laying out brackets, channels and Z flashing
- Students learning bend allowance and bend deduction

The K-factor table gives starting values only, and springback is not included. Results are planning values — make a test bend before cutting production parts. The app does not export DXF or PDF and does not calculate press brake tonnage.

Alternatives to Sheet Metal Bend Allowance

Looking for apps like Sheet Metal Bend Allowance? Here are 6 similar Android apps on Google Play. All of them are free to download.

Sheet Metal Bend Allowance vs. alternatives
App Rating Price Installs Last updated Compare
Sheet Metal Bend Allowance – Free 0+ Oct 2, 2026
Jet Engine Start Simulator – Free 0+ Oct 5, 2026 Compare
Train Horn & Steam Whistle – Free 0+ Oct 5, 2026 Compare
Motorcycle Rev Sound Simulator – Free 0+ Oct 5, 2026 Compare
Turbo & Blow-off Valve Sound – Free 0+ Oct 5, 2026 Compare
Music Box: Christmas Carols – Free 5+ Oct 5, 2026 Compare
Snowfall Night: Snow Ambience – Free 0+ Oct 5, 2026 Compare

Compare Sheet Metal Bend Allowance with the top alternatives: ratings, updates, ASO score and keyword gaps →

Similar apps on Google Play