Railway track gauge
Track gauge
By transport mode
By size (list )
Minimum
Minimum
Fifteen inch
381 mm
(15 in)
Narrow
(1 ft 11+ 5 ⁄8 in)
(2 ft)
(2 ft 3 in)
(2 ft 5+ 1 ⁄2 in)
(2 ft 5+ 15 ⁄16 in)
(2 ft 6 in)
891 mm
900 mm
914 mm
950 mm
(2 ft 11+ 3 ⁄32 in)
(2 ft 11+ 7 ⁄16 in)
(3 ft)
(3 ft1+ 13 ⁄32 in)
Metre
1,000 mm
(3 ft 3+ 3 ⁄8 in)
Three foot six inch
1,067 mm
(3 ft 6 in)
Four foot
1,219 mm
(4 ft)
Four foot six inch
1,372 mm
(4 ft 6 in)
1432 mm
1,432 mm
(4 ft 8+ 3 ⁄8 in)
Standard
1,435 mm
(4 ft 8+ 1 ⁄2 in)
Broad
(4 ft 8+ 7 ⁄8 in)
(4 ft 9+ 3 ⁄32 in)
Leipzig gauge
1,458 mm
(4 ft 9+ 13 ⁄32 in)
Toronto gauge
1,495 mm
(4 ft 10+ 7 ⁄8 in)
(4 ft 11+ 27 ⁄32 in)
(5 ft)
1,581 mm
1,588 mm
1,600 mm
(5 ft 2+ 1 ⁄4 in)
(5 ft 2+ 1 ⁄2 in)
(5 ft 3 in)
Baltimore gauge
1,638 mm
(5 ft 4+ 1 ⁄2 in)
(5 ft 5+ 21 ⁄32 in)
(5 ft 6 in)
Six foot
1,829 mm
(6 ft)
Brunel
2,140 mm
(7 ft 1 ⁄4 in)
Breitspurbahn
3,000 mm
(9 ft 101 ⁄8 in)
Change of gauge
By location
A BL 9.2-inch howitzer with shells lined up on the ground recently delivered from the trench railway in the foreground during World War I .
Two foot and 600 mm gauge railways are narrow gauge railways with track gauges of 2 ft (610 mm ) and 600 mm (1 ft 11+ 5 ⁄8 in ), respectively. Railways with similar, less common track gauges, such as 1 ft 11+ 3 ⁄4 in (603 mm ) and 1 ft 11+ 1 ⁄2 in (597 mm ), are grouped with 2 ft and 600 mm gauge railways.