# CMM Stair Rail Calculator — Tool for fence contractors

> Tool for fence contractors (iPhone/iPad app by Custom Machine Motioneering, Inc.)

- Source: https://appshunter.io/ios/app/cmm-stair-rail-calculator/id1610352465 (this page in markdown: same URL + `.md`)
- Developer: [Custom Machine Motioneering, Inc](https://appshunter.io/developer/1610352467)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 33 MB
- Languages: English, Spanish
- Released: 2022-02-17
- Data updated: 2026-05-13
- User reviews in markdown: https://appshunter.io/ios/app/cmm-stair-rail-calculator/id1610352465/reviews.md

## What is CMM Stair Rail Calculator?

This is a specialized app for contractors building picket-fence stair rails. The app calculates the sizes and positions of the holes to cut, as well as other useful details.

This app calculates the following information for stair rails:
- Rise
- Run
- Angle
- Rail length
- Spacing between pickets
- Number of pickets
- Spacing between holes on rail
- Height of holes on rail and on post
- Cut position and angle for cutting rail ends vertically

Convenient diagrams make it easy to enter your measurements in the app.

After doing a calculation, simply tap the Share button to share your results (via text or email), save them to a note-taking app, or copy them to the clipboard.

For many years, CMM has been a nationwide leader in industrial automation equipment for fence and rail manufacturing. Our MotionFORCE software is in use on thousands of automated routing machines across the United States and worldwide. Now, with this app, we're pleased to offer one of the features of MotionFORCE completely free!

Stay tuned for more exciting apps from CMM!


## Version history (last 5 releases)

### 26.4.0 — 2026-04-15

- Updated design
- Design-related bug fixes
- Security updates

### 26.1.0 — 2026-02-02

- The app now calculates the height of the holes in each post!

- If you want to cut the ends of each rail vertically, the app now shows the position and angle of the cut to make.

- The app now requires entering a post width and post wall thickness. This allows for calculation of the post hole height, and allows the app to detect if the insertion distance is impossibly large (i.e., if the rail hits the far wall of the post).

- The Results screen now saves your length-unit preference.

- Backspace functionality has been improved.

- Software dependencies have been updated for security.

### 25.11.0 — 2025-12-17

- Under-the-hood improvements
- Updated software dependencies for security
- Fixed a small bug that did not affect calculation accuracy

### 25.2.0 — 2025-02-19

- Security updates

- New app icon

- Based on user feedback, we've added a "fractional inches" setting in the Results screen.

- Minor wording change: "Picket width" is now called "Picket size" for better consistency with CMM's MotionFORCE software.

### 23.10.0 — 2023-10-10

- Improved Help dialog
- Clarified app description
- Enlarged the buttons used for entering measurements
- Improved Spanish translation
- Updated CMM website links
- Updated software dependencies for security

## Apps similar to CMM Stair Rail Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Baluster Calculator Elite](https://appshunter.io/ios/app/baluster-calculator-elite/id689888381) | 4.9 (307) | $8.99 | Utilities |
| [Stair Stringer](https://appshunter.io/ios/app/stair-stringer/id1550828339) | 4.7 (75) | $1.99 | Utilities |
| [Stair Calculator: Construction](https://appshunter.io/ios/app/stair-calculator/id1493037366) | 4.1 (726) | Free | Utilities |
| [Buildr - Building Calculator](https://appshunter.io/ios/app/buildr/id6446961698) | 4.8 (13) | Free | Utilities |
| [Even Spacing Calculator](https://appshunter.io/ios/app/even-spacing-calculator/id1597748322) | 4.2 (22) | $2.99 | Utilities |
| [RedX Stairs - 3D Calculator](https://appshunter.io/ios/app/redx-stairs/id1589688170) | 4.5 (343) | Free | Utilities |

## Related topics

[cmm stair rail calculator](https://appshunter.io/ios/topics/cmm-stair-rail-calculator) · [baluster calculator elite](https://appshunter.io/ios/topics/baluster-calculator-elite) · [balusterpro](https://appshunter.io/ios/topics/balusterpro) · [baluster calculator](https://appshunter.io/ios/topics/baluster-calculator) · [stairs calculator](https://appshunter.io/ios/topics/stairs-calculator) · [stair calculator](https://appshunter.io/ios/topics/stair-calculator)

---

*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 2026-05-13.*