About
SCARM, which stands for Simple Computer Aided Railway Modeller, is a leading desktop software tailored for model train hobbyists who want to plan and build accurate railroad layouts. Running on Windows 7/8/10/11, the software provides an intuitive drag-and-drop environment for creating complex multi-level railroad designs complete with train stations, tunnels, bridges, slopes, and full signalling systems. With over 255 track and object libraries from major manufacturers—including Atlas, Arnold, Bachmann, Aristo-Craft, and many more—users can design layouts using the exact real-world components they intend to purchase. Flex-track shaping tools allow for realistic and organic curve designs, while drawing tools let users add buildings, roads, and infrastructure to bring layouts to life. The instant 3D Viewer lets users inspect their design from any angle with a single click, providing a realistic visualization before any physical construction begins. The optional Model Trains Simulator extension takes this further by allowing users to test train operations on the digital layout, helping identify switch and junction issues early. Users can also export layouts, print detailed shopping lists of required track pieces, and share plans with the broader model train community. SCARMis available as freeware with a track count restriction or as a fully licensed paid version with unlimited tracks and objects. It is ideal for hobbyists, model train club members, and anyone planning a basement or table-top railroad build.
Key Features
- 255+ Track Libraries: Access an extensive collection of over 255 track and object libraries from leading manufacturers including Atlas, Bachmann, Arnold, Aristo-Craft, and many more.
- Instant 3D Preview: View your complete layout in full 3D from any angle with a single click, allowing realistic visualization before any physical construction begins.
- Model Trains Simulator: An optional extension that lets you simulate live train operations on your designed layout to test track plans and catch issues before building.
- Multi-Level Layout Design: Design layouts across multiple levels with configurable heights, slopes, tunnels, and bridges for complex and realistic railroad plans.
- Export & Shopping List Generation: Export your layout design for sharing, and automatically generate a printable list of all required track pieces to use as a purchase guide.
Use Cases
- Designing complex model railway layouts for home basement or dedicated train room setups
- Planning track configurations for model train clubs and community exhibition layouts
- Testing switch, junction, and siding arrangements virtually before purchasing materials or cutting wood
- Creating multi-level railroad designs with realistic tunnels, bridges, and elevation changes
- Generating precise parts lists and shopping guides for model train track and accessory purchases
Pros
- Free to Download and Use: SCARM is available as freeware, making it accessible to hobbyists of all budgets without any upfront cost.
- Extensive Manufacturer Track Support: With 255+ libraries covering major brands, users can design layouts using the exact components they plan to buy, ensuring accuracy.
- 3D Visualization and Simulation: The built-in 3D viewer and optional train simulator allow thorough testing of a design before committing to a physical build, saving time and money.
- Beginner-Friendly Interface: Designed for hobbyists of all skill levels with an intuitive workflow, getting started guides, and comprehensive online help and FAQ.
Cons
- Windows Only: SCARM is exclusively available for Windows 7/8/10/11, leaving Mac and Linux users without a compatible version.
- Track Limit in Free Version: The freeware edition restricts the number of tracks and objects that can be placed, requiring a paid license to unlock unlimited use.
- No Web or Mobile Access: SCARM requires a standalone Windows installation and cannot be accessed via a browser or on mobile devices.
Frequently Asked Questions
Is SCARM free to use?
SCARM is available as freeware with limited functionality—specifically a cap on the number of tracks and objects. A paid licensed version is available for users who need unlimited tracks and full features.
What operating systems does SCARM support?
SCARM supports Windows 7, 8, 10, and 11. It also requires an OpenGL-compatible graphics card to enable the 3D viewer.
How many track libraries are included in SCARM?
SCARM includes more than 255 track and object libraries from major model railway manufacturers worldwide, including Atlas, Bachmann, Arnold, Aristo-Craft, and many others.
Can I simulate train operations on my layout in SCARM?
Yes. SCARM supports an optional Model Trains Simulator extension that lets you run virtual trains on your designed layout to test operations, spot problems, and refine your track plan before building.
Can I export or print my layout from SCARM?
Yes. SCARM allows you to export your layout design for sharing with other enthusiasts and to print a detailed list of required track pieces that can be used as a shopping list when purchasing materials.
