Electricity consumption of various home appliances like bulb, fan, TV will be estimated by giving inputs of “Watts” and “duration of usage per day” of each home appliance. By consolidating the inputs of all the electrical home appliances entered, bi-monthly electricity bill amount and bi-monthly total electricity consumption in Units by a house in Tamil Nadu State, India will be estimated.

Also "bill amount" can be estimated by giving "Units" consumed as input & "Units" consumed can be estimated by giving "bill amount as input.