To calculate your electric consumption, you will first need to understand how many units you consume in a day through the electric appliances you have within the house. You can simply multiply the consumption units of these appliances by the number of hours you use it in a day and you will have the number of watt-hours consumed each day by these appliances.
How to calculate Watt-hours Per Day
Device Wattage (watts) x Hours Used Per Day = Watt-hours (Wh) per Day
If you use a table fan that uses 20 watts for 4 hours per day, then the calculation is
20W x 4 hours = 80 daily watt hours (Wh) consumption
How to calculate Watt-Hours to Kilowatt
The energy bills you receive are calculated in Kilowatt-hour consumption; you can arrive at it by dividing watt-hour usage / 1000
Device Usage (Wh) / 1000 (Wh/kWh) = Device Usage in kWh, Kilowatt-hours = watt-hours ÷ 1000
To know the kilowatt-hour consumption, divide the energy by 1000.
The energy in kilowatt-hours is equal to the watt-hours divided by 1,000.
A smart television using 500 Wh of electricity per day
500 / 1000 = 0.5 kWh
How to calculate Kilowatt-hour consumption for a month
Daily Usage (kWh) x 30 (Days) = Approximate Monthly Usage (kWh/Month)
A smart television using 0.5 kWh of electricity per day
0.5 kWh x 30 Days = 15 kWh/Month
Let’s move to the monthly electric bill calculations
You must know how much electricity the appliances consume on a daily and monthly basis. It may not seem a lot however when all the appliances in the house start adding up, the electric bills make a huge difference.
How to calculate the charges towards the consumption of appliances.
Cost per month = Monthly Usage (kWh) x Electric Rate (£/kWh)
A smart television using 15 kWh/Month with an electric rate of £0.10/kWh
15 kWh x £0.10 = £1.13/Month