Swedish three-foot–gauge railways

[1] As of 2016, the total network with this gauge is 65 km (40 mi), all of which is electrified[2] (excluding lines which only remain as heritage railways).

Some were converted to standard gauge (the latest one was KBJ, Kalmar–Berga Järnväg, between Berga and Kalmar in the 1970s) and some remain as heritage railways.

A branch line of Roslagsbanan, Långängsbanan, was built in 1911 and ran for some years as an isolated 1,435 mm (4 ft 8+1⁄2 in) standard gauge tramway in anticipation of a planned conversion of the main line to raise its capacity, but those plans came to naught and the branch was rebuilt to narrow gauge in 1934; it is closed since 1966.

The Nordmark-Klarälvens Järnväg (NKlJ) was a 175 km (109 mi) network issued from different lines built from 1873.

[4] The longest remaining Swedish three-foot–gauge railway is the 126 km (78 mi) heritage line from Åseda to Virserum, Hultsfred and Västervik.