How to Calculate your Monthly Electrical Expenses/Cost

How to Calculate your Monthly Electrical Expenses/Cost

How to Calculate your Monthly Electrical Expenses/Cost

If your Electrical Bill is running sky high monthly, knowing how they add up might give you a rough idea on where you can save up. In every household, the biggest culprits that can send your Bill sky rocking are:

1. The Air-Conditioner

2. The Refrigerator

3. The Electric Kettle

4. The Microwaves, Televisions

5. The Rice Cooker

6. The Hot Plates

7. Electric Iron

8. The Geyser

9. And whatever that you have that uses some kind of electrical, heating elements or motors etc.


How to Calculate the Cost of Running an Air Conditioner

To calculate the amount of money you have to pay to run a 1.5 horse-power air-conditioning unit for say, 8 hours, you will need to know the wattage of the unit. Air-conditioners and all other motors for that matter specify the Wattage on the labels. Instead, they state the Horsepower. So it is suffice to know and memorise that:

1 Horse-Power = 746 watts

The reason we need to know the wattage is simply because our Electrical Meters that we have outside our houses reads in Kilowatt Hours, thus the name kilowatt hour meter. The latest rates charged by State Power Distribution Companies and the rates vary from state to state with further divided in three brackets homes, commercial, & Industrial. You can change that if there is a revision that the rates applicable in your case have to be checked so a simple calculation would be:

1.5 horse-power = 1119 watts

1119 watts x 8 hours/day = 8952 watts

8952 divided by 1000 = 8.952 kWh

8.952 x Rate per unit = cost/day

cost/day x 30 = cost/month

That’s just a rough idea, but that is roughly how much you will be paying if you run your Air-conditioner for 8 hours a day for 30 days. Bear in mind that the consumption will also go up if the unit is not properly maintained or if it is an old unit that has succumbed to wear and tear to find out where are you losing you may need to get an Energy Audit done.

Using the same formula, you can calculate each and every electrical item that you have in your house, add them together and you can guess roughly how much you will have to pay monthly.

Just for fun’s sake. Lots of people don’t like to light up the dark corners of their houses when they go to sleep at night fearing that they will have to pay extra electrical charges. Just calculate the cost of leaving a 40 watt fluorescent lamp switched on from 8 pm to 8 am the next morning.


1 fluorescent light = 40 watts

40 watts x 12 hours = 480 watt

hour 480 divided by 1000 = 0.48 kWh

0.48 x Rate per unit = cost per day.

(12 hours) Cost per day x 30 = Cost per month

Is that Too Much You Pay for Your Compounded Power Monthly Requirements?

Leave a Reply

* Name:
* E-mail: (Not Published)
   Website: (Site url withhttp://)
* Comment:
Type Code
Please wait...