How to Compute Electricity Consumption

compute electricity consumption

Knowing how to compute electricity consumption can be a valuable skill to learn. It can help you to figure out how much energy certain appliances and devices use and cut back on use if necessary. It can also help you to get a better understanding of your electric bill and make sure you are not getting overcharged for your services. Read on to learn how to compute electricity consumption in your home.

Determining Wattage

The first step in how to compute electricity consumption is finding the wattage of the devices and appliances in your home. Many devices will have the number of watts it uses on a wattage label that is on the device. Others may have this information available in its owner’s manual.

If you can not find the wattage on a wattage label or in an owner’s manual, you can use a wattage measuring device. You can just plug your device or appliance into the wattage measuring device and it will give you this information. Another option is to call the manufacturer. They should be able to give you the wattage of the appliance if you provide them with the model number. There also may be online resources that can give you rough estimates of how much energy certain appliances use.

How to Compute Electricity Consumption

Once you have determined how much wattage your appliances or devices are using, you are ready to move on to compute electricity consumption. To do this, simply follow these steps:

  1. Determine watts per day: Multiply the number of the unit’s wattage by how many hours you use it each day. So, if you are using a 125 watt television for 3 hours a day, you would multiply 125 by 3 which gives you the result of 375 watt hours per day.
  2. Convert to Kilowatts: It is now necessary to convert this number to kilowatts. That’s because your utility company will measure your electricity consumption in kilowatts and that’s how it will appear on your electricity bill. To do this, divide your watt hours per day by 1000. If you continue with our previous example, you will now be at .375 kWh per day.
  3. Find your monthly total: Because your electricity bill will give you a monthly total, you will have to find your monthly total as well. To do this, multiply your number by 30, one for each day of the month. We are now at 11.25 kWh per month.
  4. Find our rate per kilowatt: Now you need to find out how much you pay per kWh. This will be revealed on your electric bill. So, if you pay 10 cents per kilowatt hour, multiply your kWh per month by .10. In our example we have now arrived at $1.13 per month.

Now you know how to compute electricity consumption. You have the number you need to determine how much the appliance is costing you to run a month, whether this cost is excessive and whether it’s matching what you are being charged on your electricity bill. If you find that certain appliances are costing you too much to run, you may want to replace them with more energy efficient models. Either way, knowing how to compute electricity consumption is a useful skill that can end up saving you money on your electric bill.