Track gauge conversion



Minimum
Fifteen inch	381 mm	(1 ft 3 in)

Narrow
600 mm	600 mm	(1 ft 11+5⁄8 in)
Two foot	610 mm	(2 ft)
Two foot three inch	686 mm	(2 ft 3 in)
750 mm	750 mm	(2 ft 5+1⁄2 in)
Bosnian gauge	760 mm	(2 ft 5+15⁄16 in)
Two foot six inch	762 mm	(2 ft 6 in)
Swedish three foot	891 mm	(2 ft 11+3⁄32 in)
900 mm	900 mm	(2 ft 11+7⁄16 in)
Three foot	914 mm	(3 ft)
Italian metre	950 mm	(3 ft 1+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
Italian broad gauge	1,445 mm	(4 ft 8+7⁄8 in)
Dresden gauge	1,450 mm	(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)
1520 mm	1,520 mm	(4 ft 11+27⁄32 in)
Five foot	1,524 mm	(5 ft)
Pennsylvania gauge	1,581 mm	(5 ft 2+1⁄4 in)
Pennsylvania gauge	1,588 mm	(5 ft 2+1⁄2 in)
Five foot three inch	1,600 mm	(5 ft 3 in)
Baltimore gauge	1,638 mm	(5 ft 4+1⁄2 in)
Iberian gauge	1,668 mm	(5 ft 5+21⁄32 in)
Five foot six inch	1,676 mm	(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)

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Track gauge conversion is the changing of one railway track gauge (the distance between the running rails) to another. In general, requirements depend on whether the conversion is from a wider gauge to a narrower gauge or vice versa, on how the rail vehicles can be modified to accommodate a track gauge conversion, and on whether the gauge conversion is manual or automated.