A typical 1 Ton Portable AC comes with a cooling capacity of 12000 BTU to chill down an area up to 120 sq. ft. The electricity unit is measured by kWh (Kilowatt-hour). When we convert the BTU value to kWh, we find that such an AC consumes 3.51 units of electricity. If the unit cost of electricity is Rs 8, the cost of electricity becomes Rs 28.08/ day. Please note that electricity consumption can vary day by day according to the need of the users.