Kalvoy is a village in Chengalpattu tehsil in district of Kancheepuram, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kalvoy was 2,214 which includes 1,102 males and 1,112 females. Kalvoy covers 567.23 ha area. Pincode of Kalvoy is 603108.