# Rail Model Track Calc — Calc for railroad model layout > Calculates diagonal railroad model track layout dimensions for accurate construction. (iPhone/iPad app by Nobuyuki Kumakura.) - Source: https://appshunter.io/ios/app/rail-model-track-calc/id1529070758 (this page in markdown: same URL + `.md`) - Developer: [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) - Category: Utilities - Price: Free - Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 15.4 · 9 MB - Languages: English, Japanese, Russian - Released: 2020-08-29 - Data updated: 2026-08-06 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/rail-model-track-calc/id1529070758/reviews.md ## What is Rail Model Track Calc? Overview This is an application that can calculate the horizontal and vertical lengths when laying out the railroad model tracks diagonally. For example, when a straight track is laid out after laying a curved track(e.g. 45° angle). Or straight tracks after laying out railroad points (e.g. 15°) etc. If you lay out the track diagonally like this, It is necessary to know the horizontal and vertical dimensions in order to combine other tracks to create a layout. But, it is troublesome to calculate the size. There is also need to rely on intuition. So please, use this application. This application you can easily calculate the dimensions of the track. How to use 1. Enter a millimeter number for the track length. 2. Select an angle. 3. The Horizontal, Difference, and Vertical, which are the calculation results, are displayed. Decimal point can be used. Calculation result As the calculation result, the horizontal length (angle 0°), horizontal difference, and vertical length are displayed in units of 0.5 mm. The error of the calculation result is less than 0.5mm Reset button The numbers and angles are reset. Disclaimer This calculator is for the railroad modeling hobby. The calculation results is the numerical value which be calculated by the developer. It may be different from the numerical value by model manufacturer. In particular, commercially available railroad model rails allow for dimensional errors. Therefore, the calculation results do not necessarily represent what the track layout cannot or can be done. This application is subject to change without notice. The developer assumes no responsibility for any loss or claims by third parties which may arise from the use of this application. ## Key features - Calculate horizontal and vertical track lengths - Input track length and angle - Precise measurements in 0.5 mm increments - Error margin less than 0.5mm - Reset function for calculations - Designed for railroad modeling hobbyists ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/rail-model-track-calc/id1529070758/reviews.md ### 1/5 — Deleted *2020-12-04* Not sure how it works. Not intuitive. **Developer response:** Sorry for the late reply. There is a manual in the latest version. The operation method is described in "? icon > help > manual". Also, I have released another app, "Rail Model Calc". The operability is similar to that of a normal calculator. It has a more intuitive operability and can also calculate Curve and S-Curve, so please try installing it. ## Frequently asked questions about Rail Model Track Calc ### What does Rail Model Track Calc do? Rail Model Track Calc helps you calculate the horizontal and vertical lengths needed when laying out railroad model tracks diagonally. You input the track length and angle, and it provides the precise dimensions for your layout. ### How accurate are the calculations in Rail Model Track Calc? The calculation results are displayed in units of 0.5 mm, with an error margin of less than 0.5mm. This ensures a high degree of precision for your model railroad track planning. ### Can I use Rail Model Track Calc for any track manufacturer? This calculator is for the railroad modeling hobby. While it provides calculated values, the developer notes that commercially available railroad model rails may have dimensional errors, and results may differ from manufacturer specifications. ### Is Rail Model Track Calc free to use? Yes, Rail Model Track Calc is available for free. However, it does contain advertisements. ### Does Rail Model Track Calc have ads? Yes, Rail Model Track Calc contains advertisements. ### What devices is Rail Model Track Calc available on? Rail Model Track Calc is supported on iPhone, iPad, and iPod devices. ### How often is Rail Model Track Calc updated? The latest version, 1.2.8, was last updated on May 26, 2026. This indicates a recent update, suggesting ongoing support and potential improvements. ### What is the age rating for Rail Model Track Calc? Rail Model Track Calc has an age rating of 4+, making it suitable for a wide range of users interested in the hobby. ## Version history (last 5 releases) ### 1.2.8 — 2026-05-26 Modified Help screen. ### 1.2.7 — 2023-12-18 Modified Help screen. ### 1.2.6 — 2023-12-04 Fixed Help screen. Fixed some bugs. ### 1.2.2 — 2023-05-01 Add Help screen. Fixed some bugs. ### 1.0 — 2020-08-29 No release notes. ## Apps similar to Rail Model Track Calc | App | Rating | Price | Category | | --- | --- | --- | --- | | [Lionel Wireless Camera](https://appshunter.io/ios/app/lionel-wireless-camera/id1297821311) | 3.2 (14) | Free | Utilities | | [ECoS Cab](https://appshunter.io/ios/app/ecos-cab/id1481627848) | 4.0 (5) | Free | Utilities | | [ThrottleCard](https://appshunter.io/ios/app/throttlecard/id6739982126) | 4.3 (11) | Free | Utilities | | [WiThrottle Lite](https://appshunter.io/ios/app/withrottle-lite/id344190130) | 4.5 (32) | Free | Utilities | | [WiThrottle](https://appshunter.io/ios/app/withrottle/id344172578) | 4.3 (40) | $9.99 | Utilities | | [Lionel LionChief](https://appshunter.io/ios/app/lionel-lionchief/id1155666350) | 3.6 (254) | Free | Utilities | ## More apps by Nobuyuki Kumakura - [Numeric Correction Calculator](https://appshunter.io/ios/app/numeric-correction-calculator/id6449193336) - [Rail Model Calc](https://appshunter.io/ios/app/rail-model-calc/id6474500872) All apps by Nobuyuki Kumakura: https://appshunter.io/developer/1529070760 ## Related topics [construct track movies](https://appshunter.io/ios/topics/construct-track-movies) --- *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 2026-08-06.*