The electrification of the tramway began in 1900, transitioning from steam to electricity. On 27 March 1902, the first electric tramcar in Asia ran from Esplanade to Kidderpore. By 1903–1904, it expanded to new routes, including Kalighat and Baghbazar, making the tramway a vital part of Kolkata's transportation network.
After the construction of the Howrah Bridge in 1943, the Calcutta and Howrah sections of the tram network were connected, bringing the total track length to approximately 67.59 km.