EMU route in Kolkata consists of Kharagpur Division of SER, SDAH Division, Circular railway and HWH Division of ER.
SER KGP Division has around 345 kms of EMU route.
ER HWH Division has around 410 kms of EMU route.
ER SDAH Division has around 550 kms of EMU route.
ER...
more... Circular railway has around 40kms of EMU route.
TOtal route is around 1345 kms. By next year end this route kms is expected to increase furthur.
More exact data refer Railway websites.