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Track gauge
By transport mode
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By size (list)
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Minimum
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Minimum
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Fifteen inch
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381 mm
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(15 in)
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Narrow
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- (1 ft 11+5⁄8 in)
- (2 ft)
- (2 ft 3 in)
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- (2 ft 5+1⁄2 in)
- (2 ft 5+15⁄16 in)
- (2 ft 6 in)
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- 891 mm
- 900 mm
- 914 mm
- 950 mm
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- (2 ft 11+3⁄32 in)
- (2 ft 11+7⁄16 in)
- (3 ft)
- (3 ft1+13⁄32 in)
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Metre
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1,000 mm
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(3 ft 3+3⁄8 in)
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Three foot six inch
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1,067 mm
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(3 ft 6 in)
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Four foot
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1,219 mm
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(4 ft)
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Four foot six inch
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1,372 mm
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(4 ft 6 in)
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1432 mm
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1,432 mm
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(4 ft 8+3⁄8 in)
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Standard
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1,435 mm
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(4 ft 8+1⁄2 in)
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Broad
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- (4 ft 8+7⁄8 in)
- (4 ft 9+3⁄32 in)
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Leipzig gauge
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1,458 mm
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(4 ft 9+13⁄32 in)
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Toronto gauge
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1,495 mm
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(4 ft 10+7⁄8 in)
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- (4 ft 11+27⁄32 in)
- (5 ft)
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- 1,581 mm
- 1,588 mm
- 1,600 mm
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- (5 ft 2+1⁄4 in)
- (5 ft 2+1⁄2 in)
- (5 ft 3 in)
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Baltimore gauge
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1,638 mm
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(5 ft 4+1⁄2 in)
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- (5 ft 5+21⁄32 in)
- (5 ft 6 in)
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Six foot
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1,829 mm
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(6 ft)
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Brunel
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2,140 mm
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(7 ft 1⁄4 in)
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Change of gauge
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By location
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800 mm gauge railways are narrow-gauge railways built to a track gauge of 800 mm (2 ft 7+1⁄2 in).
Whilst this gauge is uncommon amongst adhesion railways, some of the world's best known rack railways are built to it. Six of these are in Switzerland, including the world's steepest rack line (the Pilatus Railway) and the world's longest pure rack line (the Wengernalp Railway), whilst the United Kingdom's only rack railway (the Snowdon Mountain Railway) is also to this gauge. A few funicular railways are also built to this gauge.[1][2][3][4]