Simple Computer Aided Railway Modeller


SCARM means Simple Computer Aided Railway Modeller – a free software for easy and simple design of model railway layouts and railroad track plans.

With SCARM you can easily create the layout of your dreams – just download the setup package, install it and start editing your first track plan.

In SCARM you can use unlimited number of tracks and objects from more than 130 libraries and instantly see your design in 3D preview with a single click.

And don't forget – the most important is to have fun with the model trains

Follow SCARM on Twitter   


This is such a great program and so easy to use. I can sit for hours just playing about and adding to my layout.

Tom Rainbow, UK

Thank you very much for your SCARM program. Although I'm fairly new at the process, I've been able to work through some of my initial design problems by referring to your documentation.

Ray Layburn


Why in general to use SCARM?

  • Because it is easy and diverting and can be very useful
  • Because it has intuitive and lightweight user interface, that does not require extensive learning
  • Because it is FREE and has everything needed to start planning your dream railroad layout


SCARM 0.9.29 Multilingual  1.48 MB from 26 Feb 2015

System requirements:   Windows XP/Vista/7/8
OpenGL compatible graphics
Installation type:   Standalone installer
License:   Freeware

After installing, start the program and select your preferred language from "View" > "Language" menu.


What you can do with SCARM?

  • You can create complex layouts with many train stations on very large area
  • You can modelling flex-track routes easily, intuitive and most important – in very realistic way
  • You can deploy your layout on more than one level, with different heights and slopes of choosen sections from the track route
  • You can place tunnels and bridges
  • You can draw figures in order to create buildings of train stations, houses, industries, etc. together with all needed roads and infrastructure
  • You can use semaphores and color light signals to create the signalling in the layout track route
  • You can see a 3D view of your layout - just select "3D" button from the toolbar
  • You can measure distances and track sections length, using the functions in "Tools" menu
  • You can export and/or print your layout and show it to the other model trains fans and enthusiasts
  • You can view and print a list with the needed track pieces and even use it as a shopping list
  • You can share your ideas with the author, request new features and report bugs and errors, if you find some

Supported Track Libraries

Current version of SCARM supports more than 130 track and object libraries.*

  • American Flyer S Discontinued track system
  • Aristo-Craft G EU Brass
  • Aristo-Craft G US Stainless Steel
  • Aristo-Craft G US Brass
  • Arnold N
  • Atlas HO Snap-Track C100
  • Atlas HO Snap-Track C83
  • Atlas HO True-Track C83
  • Atlas N C80
  • Atlas N True-Track C65
  • Atlas N C55
  • Atlas O 2-rail C148
  • Atlas O 3-rail
  • Atlas O Industrial
  • Bachmann G Large Scale
  • Bachmann HO EZ Nickel-Silver
  • Bachmann HO EZ Steel
  • Bachmann N EZ Nickel-Silver
  • Bachmann OO Branchline
  • Bemo HOe
  • Bemo HOm Standard
  • Bemo HOm Model C70
  • Busch HOf Feldbahn
  • Eishindo T
  • ETS O
  • Faller HO AMS Slot car system Discontinued track system
  • Fast Tracks N Hand laid track templates (short versions, without curved turnouts)
  • Fleischmann HO Model
  • Fleischmann HO Profi With 3D accessories
  • Fleischmann N Piccolo
  • Flesichmann N
  • Fleischmann ТТ (turntable only)
  • Frateschi HO
  • GarGraves O 3-rail Phantom plastic and wooden ties, tin plated
  • GarGraves O 3-rail Phantom plastic and wooden ties, stainless steel
  • Hornby OO With 3D accessories
  • Hornby OO Dublo 2-rail Discontinued track system
  • Hornby OO Dublo 3-rail With 3D accessories Discontinued track system
  • Jouef HO New rails 1998-2000/01 Discontinued track system
  • Kato HO Unitrack
  • Kato N Unitrack (with all bridges and viaducts) With 3D accessories
  • Kleinbahn HO
  • Kuehn TT
  • Lenz O
  • LGB G With 3D accessories
  • Life-Like HO Power-Loc Nickel-Silver
  • Life-Like HO Power-Loc Steel
  • Life-Like N Power-Loc
  • Lima HO Discontinued track system
  • Lionel G Add-on pack
  • Lionel O
  • Lionel O FasTrack
  • Lionel O27
  • Lionel O Super O Discontinued track system
  • Lionel S American Flyer
  • Märklin HO C With 3D accessories
  • Märklin HO K
  • Märklin HO M Discontinued track system
  • Märklin I
  • Märklin Z
  • Mehano HO
  • Micro Engineering HO C83
  • Micro Engineering HO C70
  • Micro Engineering N C70
  • Micro Engineering N C55
  • Microtrains Z Micro-Track
  • Millhouse River Studio O Turntables
  • MTH O RealTrax
  • MTH S S-Trax
  • MTH Standard Gauge Lionel Corp
  • Peco G C250
  • Peco HO/OO Streamline & Set-track C100
  • Peco HO Streamline C83
  • Peco HO/OO Streamline C75
  • Peco HOm C75
  • Peco HOe/OO9 C80
  • Peco I C200
  • Peco N Streamline & Set-track C80 With 3D accessories
  • Peco N Finescale C55
  • Peco O Flat-Bottom C143
  • Peco O Bullhead C124
  • Peco Oe/O16.5/On30 C100
  • Peco Z C60 (flex-track only)
  • PIKO G
  • PIKO HO Standard Discontinued track system
  • PIKO N Discontinued track system
  • Playmobil G RC
  • ProLine G Train Line 45
  • Roco HO GeoLine
  • Roco HO Line
  • Roco HO Line (with roadbed)
  • Roco HO 2.5mm Nickel Silver Discontinued track system
  • Roco HO 2.5mm Brass Discontinued track system
  • Roco HOe
  • Roco N
  • Roco ТТ (turntable only)
  • Rokuhan Z
  • Ross Custom Switches O 3-rail
  • Shinohara N C70
  • Tillig HO Elite
  • Tillig HO Standard
  • Tillig HO/HOe 3-rail mixed tracks
  • Tillig HO/HOm 3-rail mixed tracks
  • Tillig TT Bedding
  • Tillig TT Model
  • Tillig TT Standard (BTTB/Zeuke) With 3D accessories Discontinued track system
  • Tomix N Fine Track (without bridges and viaducts)
  • Tri-ang TT A Discontinued track system
  • Tri-ang TT B Discontinued track system
  • Trix HO C With 3D accessories
  • Trix HO Express Discontinued track system
  • Trix N Minitrix
  • USA LLC Standard Gauge
  • Walthers HO Cornerstone (turntable only)
  • Walthers HO Shinohara C100
  • Walthers HO Shinohara C83
  • Walthers HOn3 Shinohara C70
  • Walthers N Cornerstone (turntable only)

  • Signals BG L Country or area specific Generic scalable library
  • Signals DE S Country or area specific Generic scalable library
  • Signals IT L Country or area specific Generic scalable library
  • Signals UK L Country or area specific Generic scalable library
  • Signals UK S Country or area specific Generic scalable library
  • Signals US L Country or area specific Generic scalable library

  • Lamps Generic scalable library
  • Trees Generic scalable library

  • Compasses Generic scalable library
  • Symbols

  • Roadways Generic scalable library

* Some of the libraries are not fully completed. Data accuracy is not guaranteed. More libraries will come soon.

Information, Tutorials & Resources

The SCARM Blog is your ultimate source for updated information about the program. It contains many useful articles and resources about SCARM.

The blog contains the following categories:

Do not miss the video tutorials about SCARM created by Ruud Boer.

If you look for examples and projects designed in SCARM, go to Layouts and Track Plans online database and search by scale, size, tracks and more.

Join us in the social sites, share your comments and stay up-to-date with all SCARM news and events.




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Useful Links

Check these links to other model train related sites and resources.

  • ANKA - Hearing aids, blood glucose & lactate meters, speech devices & cannulas, service and consumables
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