The purpose of this list is to offer a potential entry into the hobby all the information on gauge and scale he/she could possibly want. This list is always developing, so do not take it as the gospel truth. I need your input to make it more complete and accurate.
This attempts to represent model railroads, scale and collectible. I've tried to include only manufacturers who produce a reasonable product line to keep the list manageable. Theoretical Gauge shows the exact model gauge that corresponds to the prototype gauge being modeled. This is only meaningful for US models since they are (usually) modeled on specific gauges, unlike NEM specifications. It is organized by scale name, then gives all the different defined ratios for it, and then gives specs on each gauge used in the scale. I've tried to base this info on NMRA and NEM definitions first while including other national and corporate definitions.
KEY
N/A = Not Applicable
std = standard
def = definition
() = Alternate expression
Y = model in Y scale of a North Am. standard gauge RR with gauge of 56.5"
YnX.X = model in Y scale of a North Am. narrow gauge RR with gauge of X.X'
[Y] = European model in Y scale of normal gauge RR (1250mm - 11700mm)
[Ym] = European model in Y scale of metric gauge RR (850mm - 1250mm)
[Ye] = European model in Y scale of narrow gauge RR (650mm - 850mm)
[Yi] = European model in Y scale of industrial gauge RR (400mm - 650mm)
??? = some information I can't find and would appriciate adding
^M = if this occurs ignore it (text conversion bug)
[] = European specifications
{} = UK specefications if different
++ = Japaneese specifications if different
\\ = French specifications if different
// = German specifications if different
|| = New Zeland specifications if different
^^ = Austraillian specifications if different
* = NMRA defined value (without = derived value)
# = NEM defined value (without = derived value)
~ = Other (unknown source) defined value (without = derived value)
--------------------------------------------------------------------------
VI SCALE
Accepted Scale: 1:5.5 or 55.4mm=1'
STANDARD GAUGE VI
Practiced Gauge: ???
Theoretical Gauge:
Made By: ???
V SCALE
Accepted Scale: 1:8 or 38.1mm=1'3 (???)
STANDARD GAUGE V
Practiced Gauge: ??? (old def ~4-5/8" (4.625) 117mm)
Theoretical Gauge: 7.063" 179.4mm
Made By: ???
IV SCALE
Accepted Scale: 1:11 or 27.7mm=1' (old definition 1:20)
STANDARD GAUGE IV
Practiced Gauge: 2.95" ~75mm (old def 2.84" ~72mm, 2.95" ~75mm C-C)
Theoretical Gauge: 5.13" 130.3mm
Made By: ???
[INDUSTRIAL GAUGE IVi] (G GAUGE MODELLED ON EUROPEAN INDUSTRIAL GAUGE)
Practiced Gauge: 1.77" ~45.00mm
Made By: ???
1" SCALE
Accepted Scale: {1:12 or ~1"=1' 25.4mm=1'}
{STANDARD GAUGE 1"}
Practiced Gauge: 4.87" (~4-13/16") 123.6mm
Theoretical Gauge: 4.708" 120.0mm
Made By: ???
11/16" SCALE
Accepted Scale: {1:17.5 or 0.688"=1' (~11/16"=1') 17.5mm=1'}
{STANDARD GAUGE 1"}
Practiced Gauge: 3.25" (~3-1/4") 82.6mm
Theoretical Gauge: 3.229" 82.02mm
Made By: ???
2-7/8" (GAUGE) SCALE
Accepted Scale: 1:19.65 or 0.611"=1' 15.5mm=1'
STANDARD GAUGE 2-7/8
Gauge: 2.875" (2-7/8")
Theoretical Gauge: N/A
Made By: Lionel 1901-1905
McCoy (1950s)
Cohen (1970s)
T-Reproductions (RECENT)
III SCALE
Accepted Scale: 1:16 or 0.750"=1' 19.1mm=1' (old defs 1:22, 1:23)
STANDARD GAUGE III
Practiced Gauge: 2.52" ~64mm (old def 2-5/8 (2.62)~67mm C-C)
Theoretical Gauge: 3.531" 89.69mm
Made By: American Flyer ???
NARROW GAUGE IIIn3 (uses I standard track)
Practiced Gauge: ??? (old def 1.77" 45mm)
Theoretical Gauge: 2.625" 66.67mm
Made By: ???
[NARROW GAUGE IIIe] (G GAUGE MODELLED ON EUROPEAN NARROW GAUGES)
Practiced Gauge: 1.77" ~45.00mm
Made By: ???
NARROW GAUGE IIIn2.5 (used O std track)
Practiced Gauge: 1.26" ~32mm
Theoretical Gauge: 1.875" 47.63mm
Made By: ???
SM SCALE
Accepted Scale: 1:19.1 or 0.630"=1' ~16mm=1'
{METRIC GAUGE SM45}
Practiced Gauge: 1.77" ~45.00mm
Made By: ???
{NARROW GAUGE SM32}
Practiced Gauge: 1.26" ~32.00mm
Made By: ???
II SCALE
Accepted Scale: 1:22.5 or 0.633"=1" 15.5mm=1' (old defs 1:27 1:28)
STANDARD GAUGE II
Practiced Gauge: 2.13" ~54mm (2.01" ~51mm) (old def 2.125" 54mm C-C)
Theoretical Gauge: 2.511" (2.018")
Made By: Magris
[METRIC GAUGE IIm] (G GAUGE MODELLED ON EUROPEAN METRIC GAUGE)
Practiced Gauge: 1.77" ~45mm (1.75" also used)
Made By: L.G.B.
[NARROW GAUGE IIe]
Practiced Gauge: 1.26" ~32mm
Made By: ???
G SCALE (US ONLY)
Accepted Scale: 1:20.3 (1:24 also used)
NARROW GAUGE G (LARGE SCALE OR G GAUGE OF US 3' GAUGE)
(uses 1 std track)
Practiced Gauge: 1.77" ~45mm (1.75" also used)
Theoretical Gauge: 1.791" (1.500")
Made By: L.G.B.
Kalamazoo
R.E.A. (1:29)
Lionel 1987-Present
Bachman
Delton
USA Trains
Aristo-Craft
"STANDARD" (GAUGE) SCALE
Accepted Scale: 1:26.59 or 0.4513"=1' 11.5mm=1'
STANDARD GAUGE "STANDARD" (THREE RAIL)
Practiced Width: 2.125" (~2-1/8") 54.0mm
Theoretical Gauge: N/A
Made By: Lionel 1906-1939
American Flyer (PRE-WWII)
Ives (PRE-WWII)
Cohen 1991-Present
T-Reproductions (RECENT)
Williams (1970s and 80s)
Classic Model Trains (RECENT)
Boucher
"WIDE" (GAUGE) SCALE
Accepted Scale: 1:28.25 or 0.4247'=1' 10.8mm=1'
STANDARD GAUGE "WIDE" (THREE RAIL)
Practiced Gauge: ~2.00" 50.8mm
Theoretical Gauge: N/A
Made By: American Flyer (PRE-WWII)
Ives (PRE-WWII)
Dorfan (PRE-WWII)
I SCALE
Accepted Scale: ~1:32 or 0.375"=1' 9.53mm=1' (old def 1:30)
{1:30.5 or ~10mm=1'}
STANDARD GAUGE I (LARGE SCALE OR G GAUGE MODELED ON US STANDARD GAUGE)
[I] (G GAUGE MODELLED ON EUROPEAN NORMAL GAUGES)
Practiced Gauge: 1.77" ~45mm (old def 45.45mm, 1.89" 48mm C-C)
Theoretical Gauge: 1.766"
Made by: Lionel 1987-Present
Bachman
Marklin
NARROW GAUGE In2.5
Practiced Gauge: 0.945" ~24mm
Theoretical Gauge: 0.9375"
Made By: ???
[NARROW GAUGE Ie]
Practiced Gauge: 0.880" ~22.35mm
9mm SCALE
Accepted Scale: |1:33.9 or 0.345"=1' ~9mm=1'|
|NORMAL GAUGE 9mm|
Practiced Gauge: 1.26" ~32mm
Made By: ???
Q SCALE
Accepted Scale: 1:45 or 0.267"=1' 6.77mm=1'
STANDARD GAUGE Q [0] (same as O std track)
Practiced Gauge: 1.26" ~32mm
Theoretical Gauge: 1.256"
Made By: ???
7mm SCALE
Accepted Scale: 1:43.5 or 0.276"=1' ~7mm=1'
[NORMAL GAUGE 7MM]
Practiced Gauge: 33mm
Made By: ???
O SCALE (1/4" SCALE) (TECHNICALLY ZERO SCALE)
Accepted Scale: ~1:48 or 0.250"=1' 6.35mm=1'
[~1:45 or 6.773mm=1'] (US Q SCALE)
[ALSO 1:43.5 or ~7.00mm=1]
{1:43.5 or ~7.00mm=1'} (ALSO OF SCALE)
\occasionally 1:43.5 or ~23mm=1m\
/1:43.5 or ~23mm=1m/ (0 MINITEX)
(old def 17/64" = 1')
STANDARD GAUGE O (THREE RAIL)
O-27, O-42 (lighter weight with 27", 42", 54" curve diameter)
O, O-72 (heavier weight with 31", 54", 72" curve diameter)
SUPER O (realistic ties with 36" curve diameter)
(TWO RAIL) O
[0]
Practiced Gauge: 1.25" (~1-1/4") 31.8mm [1.26" ~32mm] (old def 1.38" ~35mm)
Theoretical Gauge: 1.177"
Made By: Lionel 1915-1942,1945-Present
K-Line (RECENT)
Bing (PRE-WWI)
Ives 1910-1931
Marx 1938-1975
Dorfan (PRE-WWII)
American Flyer ~1918-1941
Right-Of-Way
Kusan (1950s)
Atheran (POST-WWII)
Williams (RECENT)
Hodge (POST-WWII)
MTH (RECENT)
3rd Rail (RECENT)
Red Caboose (RECENT)
Weaver (RECENT)
STANDARD GAUGE (TWO RAIL) PROTO:48
Practiced Gauge: 1.688" (~1-11/16") 42.9mm or ~1.17"
Theoretical Gauge: 1.177"
Made By: Weaver
Williams
Red Caboose
Right-of-way
Overland Models (expensive brass in small quanities)
Sunset Models
NARROW GAUGE On4
Practiced Gauge: 1.02" ~26mm
Theoretical Gauge: 1.000" 25.40mm
Made By: ???
NARROW GAUGE On3.5 [0m (uses S std track)]
Practiced Gauge: 0.875" (~7/8") 22.4mm
Theoretical Gauge: 0.8750"
Made By: ???
NARROW GAUGE On3 (uses OO std track)
Practiced Gauge: 0.750" (*3/4") 19.1mm
Theoretical Gauge: 0.7500"
Made By: ???
NARROW GAUGE On2.5
Practiced Gauge: 0.609" (~39/64") 15.5mm
Theoretical Gauge: 0.6250"
Made By: ???
[NARROW GAUGE 0e] /0 MINEX/
Practiced Gauge: 0.650" 16.5mm
Made By: Fleishmenn
Maerklin
NARROW GAUGE On2
Practiced Gauge: ~0.500" 12.7mm
Theoretical Gauge: 0.5000" 12.7mm
Made By: ???
NARROW GAUGE On1.5 (uses N std track)
Practiced Gauge: 0.354" ~9mm
Made By: ???
I0M SCALE
Accepted Scale: {1:55 or 0.218"=1' ~5.5mm=1'}
{NORMAL GAUGE I0M}
Practiced Gauge: 0.472" ~12mm
Made By: Gem IOM
Fn3 SCALE
Accepted Scale: {1:55.5 or 0.216"=1' ~5.5mm=1'}
{NORMAL GUAGE Fn3}
Practiced Gauge: 0.650" ~16.5mm
Made By: ???
S SCALE (H1 SCALE)
Accepted Scale: 1:64th or 0.1875"=1' 4.76mm=1'
STANDARD GAUGE S [S] (C-D GAUGE)
Accepted Gauge: 0.885" (7/8") 22.4mm
Theoretical Gauge: 0.8828"
Made By: American Flyer 1945-1968;1979-Present
American Models (RECENT)
Cleavland Manufacturing 1930s
|NORMAL GAUGE S 5.5|
Practiced Gauge: ???
Theoretical Gauge: 1.03" 26.2mm
Made By: ???
[NARROW GAUGE Sm] |Sn3.5| (uses HO std track)
Practiced Gauge: 0.560" ~16.5mm
Made By: ??? |NARROW GAUGE Sn3.5|
Practiced Gauge: 0.563" (9/16") 14.3mm
NARROW GAUGE Sn3
Practiced Gauge: 0.563" (9/16") 14.3mm
Theoretical Gauge: 0.5625" 14.29mm
Made By: P-B-L
NARROW GAUGE Sn2.5
Practiced Gauge: 0.469" (~15/16) 11.9"
Theoretical Gauge: 0.4688"
Made By: ???
[NARROW GAUGE Se] (uses TT std track)
Practiced Gauge: 0.472" 12mm
Made By: ???
NARROW GAUGE Sn2 (uses N std track)
Practiced Gauge: 0.354" (~3/8") 9.52mm
Theoretical Gauge: 0.3750"
Made By: ???
TABLE TOP SCALE (_NOT_ TT)
Accepted Scale: [???]
[NORMAL GAUGE TABLE TOP]
Practiced Gauge: 0.625" (~5/8") 15.9mm
Made By: Bing 1921-1934
4mm SCALE
Accepted Scale: [1:76 or 0.1579'=1' ~4.00mm-1']
[NORMAL GAUGE 4mm]
Practiced Gauge: 0.354" ~9.00mm (16.5mm)
Made By: ???
P4/S4 SCALE
Accepted Scale: {1:76.2 or 0.1579'=1' ~4.00mm=1'}
{NORMAL GAUGE P4}
Practiced Gauge: 0.741" ~18.82mm (18.88mm also)
Made By: ???
EEM SCALE
Accepted Scale: {1:76 or 0.1579'=1' 4.00mm=1'}
{NORMAL GAUGE EEM}
Practiced Gauge: ~18.88
Made By: ???
EM SCALE
Accepted Scale: {1:76 or 0.1579'=1' 4.00mm=1'}
{NORMAL GAUGE EM}
Practiced Gauge: 0.709" 18mm (18.2 also used)
Made By: ???
OO SCALE
Accepted Scale: 1:76 or 0.1579"=1' ~4.00mm=1'
[1:91 or 0.132"=1' 3.35mm=1' or ~1.1mm=1m] 00E
(also 3.5mm = 1")
{1:76.2 or 0.157"=1' ~4.00mm=1'}
STANDARD GAUGE OO
Practiced Gauge: 0.750" (*3/4") 19.1mm (prewar def 0.748" ~19mm)
Theoretical Gauge: 0.7434"
Made By: Lionel 1938-1942
Scalecraft (1930s)
Nason (1930s)
[NORMAL GAUGE 00]
Practiced Gauge: 0.748" ~19mm
Theoretical Gauge: 0.7434"
Made By: ???
[NORMAL GAUGE 00]
Practiced Gauge: 0.650" ~16.5mm
Made By: Hornby
Lima
{BROAD GAUGE OO}
Practiced Gauge: 1.102" ~28mm
Made By: ???
{NARROW GAUGE OO9 (OOe)} (uses N standard track)
Practiced Gauge: 0.354" ~9mm
Made By: ???
HO SCALE
Accepted Scale: 1:87.1 or 0.138"=1' *3.50mm=1'
[1:87 or ~3.50mm=1' (1:90 also)]
{1:76.2 or ~4.00mm=1" (also 3.5mm = 1')}
STANDARD GAUGE HO [H0]
Practiced Gauge: 0.650" ~16.5mm
Theoretical Gauge: 0.6487"
Made By: Atheran
Roundhouse
Tyco
Life-Like
A.H.M.
Lionel 1957-1966;1974-1977
Bachman
Maerklin
Bing
Bowser
Atlas
Walthers
Atheran
Varney
Mantua
Trix
Fleishmenn
Roco
Lima
Rivarossi
Kato
^NORMAL GAUGE HO5.5^
Practiced Gauge: 0.728" 18.5mm
Made By: ???
[NORMAL GAUGE H0E]
Practiced Gauge: 0.630" ~16mm
Made By: ???
NARROW GAUGE HOn4 (uses custom track)
Practiced Gauge: 0.551" ~14mm
Theoretical Gauge: 0.4822"
Made By: ???
NARROW GAUGE HOn3.5 [HOm] (uses TT std track)
Practiced Gauge: 0.472" ~12.0mm
Theoretical Gauge: 0.4592"
Made By: Bemo
NARROW GAUGE HOn3
Practiced Gauge: 0.413" 10.5mm
Theoretical Gauge: 0.4133"
Made By: ???
[NARROW GAUGE HOn900]
Practiced Gauge: 0.407" ~10.33mm
Made By: ???
[NARROW GAUGE HOn800]
Practiced Gauge: 0.361" ~9.18mm
Made By: ???
NARROW GAUGE HOn2.5 [HOe] (uses N std track)
Practiced Gauge: 0.354" ~9.00mm
Theoretical Gauge: 0.3444"
Made By: Bemo
NARROW GAUGE HOn2
Practiced Gauge: 0.276" ~7.00mm (~9/32" also used)
Theoretical Gauge: 0.2755"
Made By: ???
[NARROW GAUGE HOn600]
Practiced Gauge: 0.271" ~6.88mm
Made By: ???
[NARROW GAUGE HOi (HOz)] (uses Z std track)
Practiced Gauge: 0.256" ~6.50mm
Made By: Gerald of Austria
NARROW GAUGE HOn1.5
Practiced Gauge: 0.157" ~4mm
Theoretical Gauge: 0.2067"
Made By: ???
E SCALE
Accepted Scale: ~1:96 0.125"=1' (~1/8"=1') 3.18mm=1'
STANDARD GAUGE E
Practiced Gauge: 0.594" (~19/32) 15.1mm
Theoretical Gauge:
Made By:
QO SCALE
Accepted Scale: ~1:96 0.125" (~1/8"=1') 3.18mm=1'
STANDARD GAUGE QO
Practiced Gauge: ~0.600" 15.2mm
Made By: ???
OOC SCALE
Accepted Scale: [~1:100 or 0.120"=1" 3.05mm=1"]
[NORMAL GAUGE 00C]
Practiced Gauge: 0.563" ~14.3mm
3mm SCALE
Accepted Scale: {1:101.6 or 0.118"=1' ~3.00mm=1'}
{NORMAL GAUGE 3mm}
Practiced Gauge: 0.559" ~14.2mm
Made By: ???
TM SCALE (version of TT)
Accepted Scale: {1:101.6 or 0.118"=1' ~3.00mm=1'}
{NORMAL GAUGE TM}
Practiced Gauge: 0.0531" ~13.5mm
Made By: ???
TT3 SCALE (version of TT)
Accepted Scale: {1:101.6 or 0.118"=1' ~3.00mm=1'}
{NORMAL GAUGE TT3}
Practiced Gauge: 0.472" ~12mm
Made By: Tri-Ang
Peco
TTX SCALE (version of TT)
Accepted Scale: {1:108 or 0.111"=1' [2.82mm=1']}
{NORMAL GAUGE TTX}
Practiced Gauge: 0.472" ~12mm
Made By: ???
TT SCALE (TABLETOP)
Accepted Scale: 1:120 or ~0.100"=1' 2.54mm=1'
[1:120 or 0.100"=1' 2.54mm=1']
|~1:120 or 0.100"=1' 2.54mm=1'|
STANDARD GAUGE TT [TT]
Practiced Gauge: 0.472" [~12mm]
Theoretical Gauge: 0.4708"
Made By: Tillig
HP Products
Arnold
Roco
Coastal Engineering
The Sign
Kato
TILLIG
[METRIC GAUGE TTm]
Practiced Gauge: 9mm
Made By: ???
NARROW GAUGE TTn3 (uses custom track)
Practiced Gauge: 0.295" 7.5mm
Theoretical Gauge: 0.3000"
Made By: ???
[NARROW GAUGE TTe]
Practiced Gauge: 0.236" ~6.5mm
Made By: ???
OOO SCALE (2mm SCALE)
Accepted Scale: 1:148 or 0.081"=1' 2.06mm=1'
{1:152.4 or 0.0787"=1' ~2.00mm=1'}
STANDARD GAUGE OOO
Practiced Gauge: 9.42mm
Theoretical Gauge: 0.3818"
Made By: ???
{NORMAL GAUGE 000}
Practiced Gauge: 0.354" 9.0mm
Made By: ???
MINITRIX SCALE
Accepted Scale: [~1:150 or 0.080"=1' 2.03mm=1']
[Also ~1:200 or 0.060"=1' 1.52mm=1"]
[NORMAL GAUGE MINITRIX]
Practiced Gauge: 0.354" ~9.00mm
Made By: Arnold 1960s
??? 1950s
2mm SCALE
Accepted Scale: [1:152.4 or ~2.00mm=1']
[NORMAL GAUGE 2mm]
Practiced Gauge: 0.374" 9.50mm (9.42 also ?)
Made By: ???
N SCALE
Accepted Scale: ~1:160 or 0.075"=1' [1.90mm=1']
{1:148 or ~2-1/16mm=1'}
[1:148 or ~2-1/16mm=1 (also 1:160)]
+~1:150 or 2.03mm=1'+
|~1:160 or 1.91mm=1'|
STANDARD GAUGE N [N]
Practiced Gauge: 0.354" ~9mm
Theoretical Gauge: 0.3531"
Made By: Arnold
Fleischmann
Roco
Trix
Lima
Kato
Atlas
Model Power (Kadee)
Con-Cor
NARROW GAUGE Nn3 [Nm] |N-NZR| (uses Z std track)
Practiced Gauge: 0.256" ~6.5mm
Theoretical Gauge: 0.2250"
Mady By: ???
HH(O) SCALE
Accepted Scale: 1:174 or 0.0620:=1' (~1/16"=1') 1.59mm=1"
STANDARD GAUGE HH(O)
Practiced Gauge: 0.313" (~5/16") 7.94mm
Made By: ???
K SCALE
Accepted Scale: [~1:180 or 0.0667'=1" 1.69mm=1']
[NORMAL GAUGE K]
Practiced Gauge: 0.315" ~8.00mm
Made By: ???
QOO SCALE
Accepted Scale: ~1:192 or 0.0625"=1" (~1/16'=1") 1.59mm=1'
STANDARD GAUGE QOO
Practiced Gauge: ~0.300" 7.62mm
Theoretical Gauge: 0.294" 7.47mm
Made By: ???
Z SCALE
Accepted Scale: ~1:220 or 0.055"=1' 1.39mm=1'
STANDARD GAUGE Z [Z]
Practiced Gauge: 0.256" ~6.50mm
Theoretical Gauge: 0.2568"
Made By: Maerklin
TTT SCALE
Accepted Scale: ~1:240 or ~0.050"=1" 1.27mm=1"
STANDARD GAUGE TTT
Practiced Gauge: ~0.236" 5.99mm
Made By: not made
M SCALE
Accepted Scale: 1:300 or 0.040"=1' 1.02mm=1'
STANDARD GAUGE M [M]
Practiced Gauge: 0.197" 5mm
Theoretical Gauge: 0.1883"
Made By: ???
X SCALE
Accepted Scale: {1:304 or 0.0394'=1' ~1.00mm=1'}
{NORMAL GAUGE X}
Practiced Gauge: 0.187" (~3/16") 4.76mm
Made By: R Walkely 1935
HZ SCALE
Accepted Scale: /~1:440 or 0.0273"=1' 0.693mm=1"/
/NORMAL GAUGE HZ/
Practiced Gauge: 0.128" ~3.25mm
Made By: Railex 1992
? SCALE
Accepted Scale: {~1:480 or 0.0250:=1' 0.635mm=1'}
{NORMAL GAUGE ?}
Practiced Gauge: 0.125" (~1/8") 3.18mm
Made By: ??? 1970s
-------------------------------END-------------------------------------
L Back to The Irvington, Hillside and Mount Clemens Railroad