KEEP EXPLORING
Planning calculators
Scale Converter
Convert prototype dimensions to HO, N, O, S, TT and Z scale—and back again.
Open guide →Grade Calculator
Calculate percent grade from rise and run, then understand what it means for train length.
Open guide →Curve Radius Planner
Compare common minimum radii and see how equipment length changes the recommendation.
Open guide →Track Spacing & Clearance
Plan parallel track centers, structure clearance and curve separation.
Open guide →Layout Size Planner
Match room dimensions, scale, reach and aisle needs to a practical layout form.
Open guide →Operations Planner
Turn industries, staging and yard tracks into a purposeful operating scheme.
Open guide →Use tools as guardrails, not absolutes
Model railroad standards provide a strong starting point, but actual performance depends on the specific locomotives, cars, couplers, wheelsets, trackwork and room conditions you use. Test your longest equipment and most demanding train before making scenery permanent.
Core planning principle
Build for access and reliability first.
A spectacular scene is far more enjoyable when every turnout, electrical joint and hidden track section can be reached for maintenance.