Rail Speed Log

Model train scale speed

Time a measured section. Keep every run, then compare your locomotives.

Measure a run

Track and timing

Measure along the track between two fixed points.

Use the built-in timer

Start and stop as the same point on the locomotive crosses each marker. Keep this tab visible.

0.00 s

Your result

Enter a distance and time to see the equivalent full-size speed.

Manual timing is an estimate. Longer sections and repeated runs help reveal variation.

Keep this run

Calculate first, then save a named run.

Your run log 0

Saved in this browser. Download a CSV to keep a separate copy.

Your first run starts here

Calculate a speed and give the locomotive a name. Each saved run keeps its distance, time and scale.

From a timed section to a useful comparison

Scale speed multiplies the model’s measured speed by its scale denominator. At HO 1:87.1, one metre in ten seconds is 31.36 scale km/h (19.48 mph). The result describes an equivalent full-size speed; it does not control your locomotive.

Keep the measured section and throttle setting consistent. Record forward and reverse separately, repeat each test, and compare the spread before interpreting a small difference. Read the measuring guide for the method, sources and limitations.