List of tram systems by gauge and electrification

Track gauge

By transport mode
Tram Rapid transit Miniature Scale model
By size (list)
Minimum   Minimum   Fifteen inch 381 mm (15 in) Narrow   600 mm Two foot Two foot three inch 600 mm 610 mm 686 mm (1 ft 11+5⁄8 in) (2 ft) (2 ft 3 in)   750 mm Bosnian gauge Two foot six inch 750 mm 760 mm 762 mm (2 ft 5+1⁄2 in) (2 ft 5+15⁄16 in) (2 ft 6 in)   Swedish three foot 900 mm Three foot Italian metre 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   Italian broad gauge Dresden gauge 1,445 mm 1,450 mm (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)   1520 mm Five foot 1,520 mm 1,524 mm (4 ft 11+27⁄32 in) (5 ft)   Pennsylvania gauge Pennsylvania gauge Five foot three inch 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)   Iberian gauge Five foot six inch 1,668 mm 1,676 mm (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
Break-of-gauge Dual gauge Conversion list Bogie exchange Variable gauge
By location
North America South America Europe Australia

The following is a list of tram/streetcar (including heritage trams/heritage streetcars), or light rail systems with their track length, track gauge, electrification system.

The vast majority of tram systems use 1,435 mm (4 ft 8+1⁄2 in) standard gauge. Generally, standard gauge is the standard for every brand new system (except for the former Soviet Union), even in places where there is another gauge for the heavy rail. Metre gauge is mainly present in some old, continuously operating systems in Central Europe. Russian gauge is used only in the former Soviet Union.

The electrification system for the old systems is generally 600 V DC while the more recent systems use 750 V DC. Some old systems upgraded to 750 V in recent years (mostly in Germany^[1]) while some systems (e.g. Romania) downgraded the voltage to 600 V to use the second-hand vehicles coming from the upgraded German networks. Few systems are partially or wholly catenary-free, with APS and ACR systems or using a pure internal power source as battery or ultracapacitors. Very few vintage systems are horse-drawn tram or cable car. For references for the figures, see each system's page.