By metric unit   By imperial units Note
(background or source)
Input
value
Produces Input
value
Produces
3mm 3 mm (0.118 in) s.g. by 1:480
3 ft 6 in gauge by 1:450 (Cape gauge, T scale)
3.2mm 3.2m s.g. by 1:450
1520mm gauge by 1:480
1600mm gauge by 1:500[ఆధారం చూపాలి]
4mm 4 mm (0.157 in)
4.5mm 4.5 mm (0.177 in) 0.177in
0.177"
0.177 in (4.5 mm) 2140mm gauge by 1:480[ఆధారం చూపాలి]
4.8mm 4.8 mm (0.189 in) s.g. by 1:300 (ZZ scale)
2140mm gauge by 1:450
0.25in
0.25"
0.250in
0.250"
0.250in 3000mm gauge by 1:500[ఆధారం చూపాలి]
6.5mm 6.5 mm (0.256 in) 0.256in
0.256"
0.256 in (6.5 mm) s.g. by 1:220 (Z scale)
3000mm gauge by 1:480[ఆధారం చూపాలి]
0.276in
0.276"
0.276 in (7 mm)
8mm 8 mm (0.315 in) s.g. by 1:180[ఆధారం చూపాలి]
2140mm by 1:300[ఆధారం చూపాలి]
8.97mm 8.97mm 0.353in
0.353"
0.353 in (8.97 mm) s.g. by 1:160 (a more exact N scale; FiNe definitions)
9mm 9 mm (0.354 in) s.g. by 1:160 (N scale, British N gauge)


3ft gauge by 1:101.6 (3mm scale)

9.42mm 9.42 mm (0.371 in) s.g. by 1:152 (2mm scale)
9.6mm 9.6mm s.g. by 1:150[ఆధారం చూపాలి]
1520mm gauge by 1:160[ఆధారం చూపాలి]
10.5mm 10.5 mm (0.413 in) 0.413in
0.413"
0.413 1676mm gauge by 1:160[ఆధారం చూపాలి]
2140mm gauge by 1:220
3000mm gauge by 1:300[ఆధారం చూపాలి]
1600mm gauge by 1:152.4[ఆధారం చూపాలి]
3ft gauge by 1:87[ఆధారం చూపాలి]
1067mm gauge by 1:101.6[ఆధారం చూపాలి]
0.47in
0.47"
0.470in
0.470"
0.470
12mm 12 mm (0.472 in) 0.472in
0.472"
0.473in
0.473"
0.472 in (12 mm) 1000 mm by 1:87 (metre gauge, H0m scale)
1067 mm by 1:87 (Cape gauge, HOn3-1/2 scale)
s.g. by 1:120 (TT scale)
2140mm gauge by 1:180[ఆధారం చూపాలి]
12.7mm 12.7 mm (0.5 in) 0.5in
0.5"
0.5in 1520mm gauge by 1:120[ఆధారం చూపాలి]
13mm 13 mm (0.512 in)
13.5mm 13.5 mm (0.531 in) 4ft 6in gauge by 1:101.6 (Scotch gauge, 3mm scale)
2140mm gauge by 1:160[ఆధారం చూపాలి]
14mm 14 mm (0.551 in) 2 ft gauge by 1:43.5 (7mm to 1 ft; O14)
1676mm gauge by 1:120[ఆధారం చూపాలి]
2140mm gauge by 1:152.4[ఆధారం చూపాలి]
14.125mm 14.125 mm (0.556 in) s.g. by 1:101.6 exact (normalised into 14.2 mm in 3mm scale)
14.2mm 14.2 mm (0.559 in) s.g. by 1:101.6 (normalised, see 14.125 mm, 3mm scale)
3000mm gauge by 1:220[ఆధారం చూపాలి]
14.28mm 14.28 mm (0.562 in)
14.3mm 14.3 mm (0.563 in) 0.563in
0.563"
0.563 in (14.3 mm) 3000mm gauge by 1:220 (initial ready-to-run style)[ఆధారం చూపాలి]
15mm 15mm 0.591in
0.591"
0.591in 1520mm gauge by 1:101.6
15.75mm 15.75 mm (0.620 in) 1600 mm gauge by 1:101.6 (Irish gauge, 3mm scale)
16.2mm 16.2 mm (0.638 in)
16.5mm 16.5 mm (0.65 in) 0.65in
0.65"
0.650in
0.650"
0.650in s.g. by 1:87 (HO scale)
1676 mm gauge by 1:101.6 (Indian broad gauge, 3mm scale)
18mm 18 mm (0.709 in) 1520mm gauge by 1:87[ఆధారం చూపాలి]
2140mm gauge by 1:120[ఆధారం చూపాలి]
18.2mm 18.2 mm (0.717 in) s.g. by 1:76 nominally (4mm to 1 ft; EM gauge)
18.83mm 18.83 mm (0.741 in) s.g. by 1:76 (4mm to 1 ft; P4 gauge)
19mm 19 mm (0.748 in)
19.05mm 19.05mm 0.75in
0.75"
0.750in
0.750"
0.750in
19.4mm 19.4 mm (0.764 in) 3000mm gauge by 1:160[ఆధారం చూపాలి]
1676mm gauge by 1:87[ఆధారం చూపాలి]
20mm 20mm 1520mm gauge by 1:76.2[ఆధారం చూపాలి]
20.5mm 20.5 mm (0.807 in)
21mm 21 mm (0.827 in) 2140 mm gauge by 1:101.6 (Brunel gauge, 3mm scale)
0.865in
0.865"
0.865 in (21.97 mm)
22mm 22 mm (0.866 in) 1676mm gauge by 1:76.2[ఆధారం చూపాలి]
22.42mm 22.42mm 0.883in
0.883"
0.883 in (22.43 mm) s.g. by 1:64 (S scale)
22.5mm 22.5 mm (0.886 in)
23mm 23 mm (0.906 in)
24mm 24 mm (0.945 in) 1520mm gauge by 1:64[ఆధారం చూపాలి]
24.7mm 24.7mm 2140mm gauge by 1:87[ఆధారం చూపాలి]
25.4mm 25.4mm 3000mm gauge by 1:120[ఆధారం చూపాలి]
26.4mm 26.4mm 1676mm gauge by 1:64[ఆధారం చూపాలి]
28.08mm 28.08 mm (1.106 in) 2140mm gauge by 1:76.2[ఆధారం చూపాలి]
1.125in
1.125"
1.125 in (28.6 mm)
1.177in
1.177"
1.177 in (29.9 mm)
30mm 30 mm (1.181 in) s.g. by 1:48 O scale
3000mm gauge by 1:101.6[ఆధారం చూపాలి]
1.25in
1.25"
1.25 in (31.75 mm) s.g. by 1:45.2 O scale
32mm 32 mm (1.26 in) s.g. by 1:44.8 O scale
18 in gauge by 1:13.7 (7⁄8mm in to 1 foot; SE scale)
1520mm gauge by 1:48[ఆధారం చూపాలి]
32.96mm 32.96 mm (1.298 in) s.g. by 7 mm to 1 foot O scale
33mm 33 mm (1.3 in) s.g. by 1:43.5 as defined by ScaleSeven
35mm 35 mm (1.378 in) 1520mm gauge by 1:43.5[ఆధారం చూపాలి]
2140mm gauge by 1:64[ఆధారం చూపాలి]
1676mm gauge by 1:48[ఆధారం చూపాలి]
3000mm gauge by 1:87[ఆధారం చూపాలి]
36.75mm 36.75 mm (1.447 in) 5ft 3in to 1:43.5 (Irish gauge, ScaleSeven)
1.75in
1.75"
1.75 in (44.45 mm) s.g. by ca. 1:32 (1 gauge)
1.000 mm gauge by 1:22.5 (G scale)
1.766in
1.766"
1.766 in (44.85 mm) s.g. by 1:32 exactly (1 gauge)
45mm 45 mm (1.772 in) 1.772in
1.772"
1.772 2140mm gauge by 1:48[ఆధారం చూపాలి]
3 ft gauge by 1:13.7 (7⁄8mm in to 1 foot; SE scale)
49.20mm
49.2mm
49.2 mm (1.937 in) 7ft ¼in by 1:43.5 (Brunel gauge, ScaleSeven)
50.8mm 50.8mm 2in
2"
2 in (50.8 mm) Mentioned here: "7⁄16 inch to 1 ft". Prototype would be ft (267 mm, see 10+12 in (267 mm)). Historical (~1900).
2.125in
2.125"
2+18 in (53.975 mm) Wide Gauge (or Standard Gauge (toy trains))
63mm 63mm 3000mm gauge by 1:48[ఆధారం చూపాలి]
63.5mm 63.5mm 2.5in
2.5"
2+12 in (64 mm)
64mm 64 mm (2+12 in) s.g. by 1:22.5
1520mm gauge by 1:24[ఆధారం చూపాలి]
70.69mm
70.64mm
70.69 mm (2.781 in) 2.781in, 2.781" 2.781 in (70.69 mm) s.g. by 1:20.3 (F- or 15mm scale):
NMRA Popular Railway Scales[1],
NMRA Proto Scales[2]
(NMRA gives two sizes in mm)
89mm 89 mm (3+12 in) 3.5in
3.5"
3+12 in (89 mm)
108mm 108mm
4.75in
4.75"
4.75
127mm 127mm 5in
5"
5 in (127 mm)
184mm 184mm 7.25in
7.25"
7.25
190.5mm 190.5mm 7.5in
7.5"
7.5
8.25in
8.25"
8.25
9in
9"
9 in (229 mm)
9.5in
9.5"
9.5
254mm 254mm 10in
10"
10
260mm 260mm 10.25in
10.25"
10.25
10.5in
10.5"
10+12 in (267 mm) See 2 in (50.8 mm) (scale 7⁄16 in to 1 ft).
305mm 305mm 12in
12"
12
311mm 311mm 12.25in
12.25"
12.25
356mm 356mm
350mm 350 mm (13+2532 in) Decauville in the Netherlands
381mm 381 mm (15 in) 15in
15"
1ft3in
1'3"
15
15.25in
15.25"
15+14 in (387 mm) Yunnan-Burma Railway Track gauge[3]
400mm
0.4m
400 mm (15+34 in)
16in
16"
1ft4in
1'4"
16
410mm 410 mm (16+532 in) Narrow gauge railways in Germany#Hesse
16.5in
16.5"
1ft4.5in
1'4.5"
16+12 in (419 mm)
17in
17"
1ft5in
1'5"
17 in (432 mm)
450mm 450 mm (17+2332 in)
457mm 457mm 18in
18"
1ft6in
1'6"
18 in (457 mm)
483mm 483mm 19in
19"
1ft7in
1'7"
19 in (483 mm)
19.5in
19.5"
1ft7.5in
1'7.5"
19+12 in (495 mm)
500mm
0.5m
500 mm (19+34 in)
508mm 508mm 20in
20"
1ft8in
1'8"
20 in (508 mm)
557mm 557 mm (21+1516 in) 2 Castilian feet (@ 278.6 mm)
21in
21"
1ft9in
1'9"
21 in (533 mm)
550mm 550 mm (21+2132 in) Narrow gauge railways in Denmark[4]

Decauville in the Netherlands[5]

559mm 559mm 22in
22"
1ft10in
1'10"
1 ft 10 in (559 mm)
578mm 578mm 22.75in
22.75"
1ft10.75in
1'10.75"
22.75
597mm 597mm 23.5in
23.5"
1ft11.5in
1'11.5"
23.5
600mm
0.6m
600 mm (1 ft 11+58 in)
603mm 603mm 23.75in
23.75"
1ft11.75in
1'11.75"
23.75
610mm 610 mm (2 ft) 24in
24"
2ft
2'
24
24.125in
24.125"
2ft0.125in
2'0.125"
24.125
620mm 620 mm (2 ft 1332 in) Decauville in the Netherlands
622mm 622mm 24.5in
24.5"
2ft0.5in
2'0.5"
24.5
26in
26"
2ft2in
2'2"
26
686mm 686mm 27in
27"
2ft3in
2'3"
2 ft 3 in (686 mm)
27.5in
27.5"
2ft3.5in
2'3.5"
27.5
700mm
0.7m
700 mm (2 ft 3+916 in)
27.75in
27.75"
2ft3.75in
2'3.75"
27.75
711mm 711mm 28in
28"
2ft4in
2'4"
2 ft 4 in (711 mm)
716mm 716 mm (2 ft 4+316 in) Narrow gauge railways in Poland#overview[6]
28.5in
28.5"
2ft4.5in
2'4.5"
28.5
29in
29"
2ft5in
2'5"
2 ft 5 in (737 mm)
750mm
0.75m
750 mm (2 ft 5+12 in) 29.5in
29.5"
2ft5.5in
2'5.5"
29.5
Bosnian
760mm
760 mm (2 ft 5+1516 in) Bosnian gauge
762mm 762 mm (2 ft 6 in) Imperial
30in
30"
2ft6in
2'6"
30 Imperial gauge
765mm 765 mm (2 ft 6+18 in)
30.5in
30.5"
2ft6.5in
2'6.5"
30.5
783mm 783mm
785mm 785 mm (2 ft 6+2932 in)
791mm 791 mm (2 ft 7+532 in) Narrow gauge railways in Denmark#Faxe Jernbahne, gauge unclear[7]
800mm
0.8m
800 mm (2 ft 7+12 in) 31.5in
31.5"
2ft7.5in
2'7.5"
31.5
802mm 802 mm (2 ft 7+916 in)
32in
32"
2ft8in
2'8"
32
820mm 820 mm (2 ft 8+932 in)
32.5in
32.5"
2ft8.5in
2'8.5"
32.5
838mm 838mm 33in
33"
2ft9in
2'9"
33
850mm 850 mm (2 ft 9+1532 in)
33.75in
33"
2ft9.75in
2'9.75"
33.75
860mm 860 mm (2 ft 9+78 in)
864mm 864mm 34in
34"
2ft10in
2'10"
34
34.5in
34.5"
2ft10.5in
2'10.5"
34.5
35in
35"
2ft11in
2'11"
35
891mm 891 mm (2 ft 11+332 in)
900mm
0.9m
900 mm (2 ft 11+716 in)
914mm 914 mm (3 ft) 36in
36"
3ft
3'
36
925mm 925 mm (3 ft 1332 in)
37in
37"
3ft1in
3'1"
3 ft 1 in (940 mm)
37.125in
37.125"
37.125
950mm 950 mm (3 ft 1+38 in)
955mm 955 mm (3 ft 1+1932 in)
965mm 965mm 38in
38"
3ft2in
3'2"
3 ft 2 in (965 mm)
38.25in
38.25"
3ft2.25in
3'2.25"
3 ft 2+14 in (972 mm)
985mm 985 mm (3 ft 2+2532 in) Zugerbergbahn funicular
metre
meter
m
1000
1000mm
1
1m
1,000 mm (3 ft 3+38 in) 39.375in
39.375"
3ft3.375in
3'3.375"
3ft3.375in metre gauge, meter
1009mm 1,009 mm (3 ft 3+2332 in) Nominally 1,009 mm metre gauge
1016mm 1016mm 40in
40"
3ft4in
3'4"
3 ft 4 in (1,016 mm)
40.5in
40.5"
3ft4.5in
3'4.5"
3 ft 4+12 in (1,029 mm)
40.75in
40.75"
3ft4.75in
3'4.75"
3 ft 4+34 in (1,035 mm)
1050mm 1,050 mm (3 ft 5+1132 in)
1055mm 1,055 mm (3 ft 5+12 in) 41.5in
41.5"
3ft5.5in
3'5.5"
3 ft 5+12 in (1,055 mm)
1062mm 1062mm
1065mm 1,065 mm (3 ft 5+1516 in) See Cape gauge wrt South Africa: sourced as such
1067mm 1,067 mm (3 ft 6 in) Cape
42in
3ft6in
3.6ft
3 ft 6 in (1,067 mm) Cape gauge (South Africa)
1093mm 1,093 mm (3 ft 7 in) 43in
3ft7in
43
1100mm
1.1m
1,100 mm (3 ft 7+516 in)
1106mm 1,106 mm (3 ft 7+12 in) 43.5in
43.5"
3ft7.5in
3'7.5"
43.5
44.25in
44.25"
3ft8.25in
3'8.25"
44.25
44.5in
44.5"
3ft8.5in
3'8.5"
44.5
45in
45"
3ft9in
3'9"
45
45.5in
45.5"
3ft9.5in
3'9.5"
45.5
1188mm 1,188 mm (3 ft 10+2532 in)
47in
47"
3ft7in
3'7"
3 ft 11 in (1,194 mm)
1200mm 1,200 mm (3 ft 11+14 in)
1217mm 1,217 mm (3 ft 11+2932 in)
1219mm 1219mm 48in
48"
4ft
4'
4 ft (1,219 mm)
1245mm 1245mm 49in
49"
4ft1in
4'1'
4 ft 1 in (1,245 mm)
49.5in
49.5"
4ft1.5in
4'1.5'
4 ft 1+12 in (1,257 mm)
1270mm 1270mm 50in
50"
4ft2in
4'2'
50
1295mm 1295mm 51in
51"
4ft3in
4'3"
51
1300mm 1,300 mm (4 ft 3+316 in) Funiculars of Lyon
52in
52"
4ft4in
4'4"
52
52.5in
52.5"
4ft4.5in
4'4.5"
52.5
1350mm 1,350 mm (4 ft 5+532 in) Santos_tramways[8]
1372mm 1,372 mm (4 ft 6 in) Scotch
54in
54"
4ft6in
4'6"
4 ft 6 in (1,372 mm) Scotch gauge
54.5in
54.5"
4ft6.5in
4'6.5"
4 ft 6+12 in (1,384 mm)
55.5in
55.5"
4ft7.5in
4'7.5"
55.5
55.75in
55.75"
4ft7.75in
4'7.75"
55.75
1422mm 1422mm 56in
56"
4ft8in
4'8"
56
56.25in
56.25"
4ft8.25in
4'8.25"
56.25
1432mm 1,432 mm (4 ft 8+38 in)
sg
standard
1435mm
1.435m
1,435 mm (4 ft 8+12 in) Stephenson[ఆధారం చూపాలి]
ussg
usstandard
nasg
nastandard
56.5in
4ft8.5in
4 ft 8+12 in (1,435 mm) standard gauge, Stephenson gauge[ఆధారం చూపాలి]
Note that input "us-..." and "na-..." places imperial measure first.
1440mm 1,440 mm (4 ft 8+1116 in)
1445mm 1,445 mm (4 ft 8+78 in)
57in
57"
4ft9in
4'9"
4 ft 9 in (1,448 mm)
1450mm 1,450 mm (4 ft 9+332 in)
1458mm 1,458 mm (4 ft 9+1332 in)
57.5in
57.5"
4ft9.5in
4'9.5"
57.5
1473mm 1473mm Ohio
58"
58in
4ft10in
4'10"
4 ft 10 in (1,473 mm) Ohio gauge
58.75in
58.75"
4ft10.75in
4'10.75"
58.75
1495mm 1495mm Toronto
58.875"
58.875in
4ft10.875in
4'10.875"
4 ft 10+78 in (1,495 mm) Toronto Transit Commission
1500mm
1.5m
1,500 mm (4 ft 11+116 in)
Russian
1520mm
1.52m
1,520 mm (4 ft 11+2732 in) Russian gauge
1524mm 1,524 mm (5 ft) 5ft exact
exact 5ft
5ft0in
60.0in
5ft exact Original Russian gauge[ఆధారం చూపాలి]
60.5in
60.5"
5ft0.5in
5'0.5"
5 ft 12 in (1,537 mm)
62in
62"
5ft2in
5'2"
5 ft 2 in (1,575 mm)
62.1875in
62.1875"
5ft2.1875in
5'2.1875"
62.1875in
1581mm 1581mm 62.25in
62.25"
5ft2.25in
5'2.25"
5 ft 2+14 in (1,581 mm)
1588mm 1588mm 62.5in
62.5"
5ft2.5in
5'2.5"
5 ft 2+12 in (1,588 mm) 62.5 in = Pennsylvania Trolley Gauge
Victorian
Irish
1600mm
1.6m
1,600 mm (5 ft 3 in) 63in
63"
5ft3in
5'3"
5 ft 3 in (1,600 mm) Victorian (Rail gauge in Australia), Irish gauge
Victorian 1,600 mm (5 ft 3 in) As Irish, with different link: 1,600 mm (5 ft 3 in) Victorian broad gauge
1638mm 1638mm Baltimore Streetcar System
1664mm 1,664 mm (5 ft 5+12 in) pre-1955 Portuguese gauge (5 Portuguese feet?)
1668mm
1.668m
1,668 mm (5 ft 5+2132 in) Iberian gauge since 1955, average of older Portuguese and Spanish gauges.
1672mm 1,672 mm (5 ft 5+1316 in) pre-1955 Iberian gauge (6 Castilian feet @ 278.6 mm)
1676mm 1,676 mm (5 ft 6 in) Provincial
Indian
66in
66"
5ft6in
5'6"
5.5ft
5 ft 6 in (1,676 mm) Provincial, Indian broad gauge
1680mm 1680mm
68in 5 ft 8 in (1,727 mm) Fisherman's Walk Cliff Railway, Babbacombe Cliff Railway
1.75m
1750mm
1,750 mm (5 ft 8+78 in)
1829mm 1829mm 72in
72"
6ft
6'
6 ft (1,829 mm)
1850mm 1,850 mm (6 ft 2732 in) Falls Incline Railway
1880mm 1,880 mm (6 ft 2 in) 74in
74"
6ft2in
6'2"
6 ft 2 in (1,880 mm)
1945mm 1,945 mm (6 ft 4+916 in)
7ft exact
exact 7ft
7ft0in
84.0in
7 ft exact Original Brunel gauge[ఆధారం చూపాలి]
2140mm
2.14m
2140mm Brunel
84in
84"
7ft
7'
84.25in
84.25"
7ft0.25in
7'0.25"
7 ft (2,134 mm) Brunel gauge (Great Western Railway)
Note that input "met-..." places metric measure first.
2000mm
2m
2,000 mm (6 ft 6+34 in)
8ft 8 ft (2,440 mm) Johnstown Inclined Plane
3000mm
3m
3,000 mm (9 ft 10+18 in) 118.11in
118.11"
9ft10.11in
9'10.11"[ఆధారం చూపాలి]
118.11in Nazi broad gauge[ఆధారం చూపాలి] (Breitspurbahn)
120in
120"
10ft
10'
10 ft (3,048 mm)
8200mm 8,200 mm (26 ft 10+2732 in) Funicular#Inclined lift


References

  1. NMRA 70.64mm
  2. NMRA 70.69mm
  3. "Toy railway". 1939-12-08. Retrieved 2013-11-10.
  4. Philip Pacey. "A visitors'guide to Nordic (Scandinavian) narrow gauge railways". Retrieved 2013-08-06.
  5. "Collection" (in Dutch). Decauville Spoorweg Museum. Retrieved 2013-08-06. In de collectie bevinden zich voertuigen met 350, ..., 550, ..., 620, ... mm spoorwijdte.{{cite web}}: CS1 maint: unrecognized language (link)
  6. Andrew Goodwin; Stephen Goodwin; Dave Meller (2004). "Kruszwica sugar works". Retrieved 2013-08-06. Existed until 1923.
  7. "Faxe Jernbane" (in danish). Retrieved 2013-08-06.{{cite web}}: CS1 maint: unrecognized language (link) Google translated: In the following book, Østbanen 1879-2004, indicated gauge to 2 ½ feet or 791 mm. Nevertheless acquired Garde in 1866 a used German mine locomotive gauge 785 mm. This difference in gauge targets impossible did not [did not make impossible], however, use of the locomotive, which was in operation on the field all the way to 1921. This is perhaps one of the reasons for the doubts surrounding the runway actual gauge, there are several places specified for both 785 mm (evp have even one such example) and 791 mm. Thus mention Wikipedia [da:Faxe Jernbane]: "There is no doubt about the route originally used gauge. Figures have admittedly several places in the literature as 791 mm, but in the delivery protocol of train factory Krauss set in 1874, 1907, 1914 and 1927 having delivered locomotives gauge 785 mm. It is somewhat unclear why mentioned one at the track width 791 mm. There should probably be a shift over the years, since Faxe Limestone Quarry around 1970 ordered 2 diesel locomotives in Schöma with a desired track width of 791 mm."
  8. Morrison, Allen. "The Tramways of Santos (São Paulo state), Brazil". Retrieved 2013-11-12.