Western Reserve Division 5 MCR of NMRA
Scale Speed Calculator

  1. Select your Scale in the first column
  2. Select distance loco has traveled in second column
  3. Enter number of seconds you have timed and click button below
Scale Distance to travel Time to travel this distance in seconds:
Z (1:220) 2 inches
N (1:160) 4 inches
TT (1:120) 6 inches
HO (1:87) 12 inches Results
  inches/second
  scale mph
  scale km/h
S (1:64) 24 inches
O (1:48) 36 inches
G (1:22.5) 48 inches
other (1:)