Articles - Model Railroading Scales
02/21/2016
This page summarizes the various model railroading scales.

1:12
Name: "Doll-house"
a.k.a.: 1 foot = 1", 7.5" gauge

1:13.7
Name: 7/8 inch scale
a.k.a.: 1 foot = 7/8"
Track: common G-gauge.

1:16
Name: Gauge 4
a.k.a.: 1 foot = 3.5"

1:20.3
Name: F-scale
a.k.a.: Fn3 proper, 15mm scale
Track: common G-gauge (used as 3-foot narrow gauge track)

1:22.5
Name: G-scale
a.k.a.: European meter gauge
Track: common G-gauge (track spacing is considered a scale 1-meter)

1:24
Name: Gauge 3
a.k.a.: half scale
Track: common G-gauge (a compromised narrow gauge simulation)

1:29
Name: Common G-scale
Track: common G-gauge (as scale standard-gauge track at a slight compromise)

1:32
Name: Gauge 1
a.k.a.: 3/8" = 1 foot
Track: common G-gauge (which is correct for this scale)

1:43.5
Name: British O-scale
a.k.a.: 7mm = 1 foot

1:48
Name: U.S. O-scale
a.k.a.: 1/4" = 1 foot
Track: uses three-rail or normal two-rail track
Narrow gauge: On2, On30, On3

1:64
Name: S-scale
a.k.a.: 3/16" = 1 foot; the "perfect" scale
Narrow gauge: Sn2, Sn3, Sn42

1:76.2
Name: OO-scale (mostly UK only)
a.k.a.: 4mm = 1 foot

1:87.1
Name: HO-scale
Notes: the most popular scale.
Narrow gauge: HOn30, HOn3

1:120
Name: TT-scale

1:160
Name: N-scale
Notes: the second most popular scale.
Narrow gauge: Nn3 (uses Z-scale track)

1:220
Name: Z-scale

1:450
Name: T-scale