How does an electric power company calculate electrical energy from electric power?

Answer 1

Electricity consumption is measured in Kilowatt hours, this is one unit of electric consumption and charged according to your supplier.

You have to know how many watts your devices consume.

This is sometimes written on the ID tag or plate, or you can use a meter in line.

Multiply this wattage number by the hours it is switched on and this will tell you how much it has consumed.

e.g. A toaster may consume 1000Watts = 1Kw, if you ran it continuously for an hour it would consume 1 unit of electricity. Toasters don't run for more than a few minutes, so would use less than 1 unit per operation.

3 mins = 0.05hrs Therefore = 0.05 of a unit.

A 100W light bulb would consume 1 unit in ten hours.

100W = 0.1 KW. = one tenth of a kilowatt, so ten times this would equal 1 Kw/h, Therefore ten hours.

Answer 2

'Electricity' is not a quantity, so you cannot'calculate' it. You need to specify a quantity, such as voltage, current, resistance, power, energy, etc.

Answer 3

With a consumption meter