# Sheet Bending Calculator Pro — Bend Allowance & Deduction

> Sheet metal bending calculation tool for fabrication with inch/mm support. (iPhone/iPad app by Imran Pinjara.)

- Source: https://appshunter.io/ios/app/sheet-bending-calculator-pro/id1487482962 (this page in markdown: same URL + `.md`)
- Developer: [Imran Pinjara](https://appshunter.io/developer/1484488781)
- Category: Utilities, Productivity
- Price: $2.99
- Rating: 1.50/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.1 · 1 MB
- Languages: American English
- Released: 2019-11-12
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sheet-bending-calculator-pro/id1487482962/reviews.md

## What is Sheet Bending Calculator Pro?

Sheet Bending Calculator is a professional engineering and fabrication tool for calculating bend allowance, bend deduction, and flat pattern plate size for sheet metal bending applications.

Designed for sheet metal fabricators, press brake operators, mechanical engineers, workshop technicians, and manufacturing professionals, the app helps determine accurate flat dimensions before bending and forming.

By simplifying bend calculations and eliminating repetitive manual trigonometry and spreadsheets, Sheet Bending Calculator helps reduce material waste, minimize fabrication errors, and improve bending accuracy.

Available Calculations

• Bend Allowance (BA)
• Bend Deduction (BD)
• Flat Pattern Plate Size

Bend Allowance Calculator

Calculate bend allowance using the required bending parameters:

• Bend Angle
• Inside Bend Radius
• K-Factor
• Material Thickness

The calculated bend allowance can be used to determine the developed length required before bending.

Bend Deduction Calculator

Calculate bend deduction for sheet metal fabrication and use the result when determining the correct flat pattern dimensions before cutting and forming.

Flat Pattern Plate Size

Determine the required flat plate or sheet size before bending.

This helps fabricators prepare material accurately and reduce:

• Material Waste
• Cutting Errors
• Trial and Error
• Incorrect Measurements
• Fabrication Rework

K-Factor Based Calculation

The calculator uses K-Factor as an important input for determining bend allowance and developed sheet length. This allows users to adjust calculations according to their selected bending conditions and fabrication requirements.

Features

• Sheet metal bend calculations
• Bend allowance calculation
• Bend deduction calculation
• Flat pattern development
• K-Factor support
• Inside bend radius input
• Bend angle calculation
• Material thickness input
• Press brake fabrication support
• Metric and Imperial units
• Dimensions in mm or inches
• Fractional Imperial input support
• Automatic unit conversion
• Fast calculation results
• Simple professional interface
• No internet connection required

Applications

Sheet Bending Calculator is useful for:

• Sheet Metal Fabrication
• Press Brake Operations
• HVAC Duct Fabrication
• Enclosure Manufacturing
• Electrical Panel Fabrication
• Bracket Manufacturing
• Equipment Fabrication
• Industrial Sheet Metal Work
• Mechanical Component Manufacturing
• Workshop Production

Designed For

• Sheet Metal Fabricators
• Press Brake Operators
• Fabrication Engineers
• Mechanical Engineers
• Production Engineers
• Design Engineers
• Workshop Technicians
• Manufacturing Professionals
• Fabrication Supervisors
• Engineering Students

Sheet Bending Calculator helps you determine the correct developed sheet size before bending, allowing you to cut material accurately and achieve the required finished dimensions with less trial and error.

Whether you are fabricating brackets, panels, enclosures, ducts, equipment components, or custom sheet metal parts, the app provides a convenient tool for bend allowance, bend deduction, and flat pattern calculations.

## Key features

- Bending allowance calculation
- Bending deduction calculation
- Required plate/sheet size calculation
- Millimeter and inch settings
- Material k-factor chart
- Decimal fraction chart

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sheet-bending-calculator-pro/id1487482962/reviews.md

### 1/5 — Zero stars!

*2023-09-26, version 2.0*

Standard units give incorrect results. Not acceptable. You are fired.

### 2/5 — No option for unit change

*2021-07-28, version 1.0*

No way to change units from metric system

## Frequently asked questions about Sheet Bending Calculator Pro

### What is Sheet Bending Calculator Pro used for?

Sheet Bending Calculator Pro is used to calculate bending allowance, bending deduction, and the required plate or sheet size for bending operations in fabrication. It simplifies daily tasks for fabricators.

### Does Sheet Bending Calculator Pro support different units of measurement?

Yes, Sheet Bending Calculator Pro offers both millimeter (mm) and inch settings, allowing users to work with their preferred units for calculations.

### What reference materials are included in Sheet Bending Calculator Pro?

The app includes a material k-factor chart and a decimal fraction chart, providing essential reference data for accurate bending calculations.

### How is the plate finish size calculated in Sheet Bending Calculator Pro?

The plate finish size is calculated using the formula: finish size = length(L1) + length(L2) - bend deduction. This ensures precise sizing for fabricated parts.

### What is the price of Sheet Bending Calculator Pro?

Sheet Bending Calculator Pro is a paid application, available for a one-time purchase of $2.99.

### On which devices can I use Sheet Bending Calculator Pro?

Sheet Bending Calculator Pro is available for iPhone and iPad devices, making it accessible for Apple users.

### How often is Sheet Bending Calculator Pro updated?

The app was last updated on April 26, 2023, with version 2.0. This indicates regular maintenance and potential feature additions.

### Does Sheet Bending Calculator Pro have ads?

No, Sheet Bending Calculator Pro does not contain advertisements. As a paid application with no in-app purchases or ads, it offers an uninterrupted user experience.

## Version history (last 3 releases)

### 3.0 — 2026-08-24

Upgraded to Higher SDK Level Support.
Changes in App UI/UX.
Removed Decimal Fraction Chart.
Added a Better Unit Setting System.
Added Fractional Input Support.
Added Units Display in Result data.
fix minor bugs/issues.

### 2.0 — 2023-04-26

Unit Setting Option Added.
mm/inches selector added.
material K-factor chart added.
decimal fraction chart added.
changes in App UI.
changes in App Theme.
Upgraded to Higher SDK levels to support the latest versions.
done button added on the keyboard.
keyboard dismiss issue fixed.
Improved App User Experience.
Fix minor Bugs and Stability issues.
Improved App Performance.

### 1.0 — 2019-11-12

No release notes.

## Apps similar to Sheet Bending Calculator Pro

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Bend deduction and Flat length](https://appshunter.io/ios/app/bend-deduction-and-flat-length/id1608300708) | 1.0 (2) | $2.99 | Utilities |
| [Bending Sheet Metal](https://appshunter.io/ios/app/bending-sheet-metal/id1440030057) | 2.3 (3) | Free | Utilities |
| [Bending Sheet Metal Calculator](https://appshunter.io/ios/app/bending-sheet-metal-calculator/id6469604221) | 2.6 (5) | $5.99 | Utilities |
| [Bend Deduction & Flat Length](https://appshunter.io/ios/app/bend-deduction-and-flat-length/id6744012468) | — | Free | Utilities |
| [Bevel Calculator](https://appshunter.io/ios/app/bevel-calculator/id6749637350) | 5.0 (1) | Free | Utilities |
| [K - factor for bend allowance](https://appshunter.io/ios/app/k-factor-for-bend-allowance/id1608326238) | — | $2.99 | Utilities |

## More apps by Imran Pinjara

- [Screw Flight Pro](https://appshunter.io/ios/app/screw-flight-pro/id1484488782)
- [Miter Bend Pro](https://appshunter.io/ios/app/miter-bend-pro/id1484821889)
- [Flange Hole Marker Pro](https://appshunter.io/ios/app/flange-hole-marker-pro/id1486290745)
- [Pressure Vessel Heads Pro](https://appshunter.io/ios/app/pressure-vessel-heads-pro/id1486607999)
- [Petal Layout Pro](https://appshunter.io/ios/app/petal-layout-pro/id1486823832)
- [Pump Calculator](https://appshunter.io/ios/app/pump-calculator/id1487084383)

All apps by Imran Pinjara: https://appshunter.io/developer/1484488781

## Related topics

[bending sheet metal calculator](https://appshunter.io/ios/topics/bending-sheet-metal-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*