How To Calculate The Electrical Usage On Your Own

How To Calculate The Electrical Usage On Your Own

Having doubts about the electricity bills is not unusual. It is something that most homeowners feel when they receive high monthly bills than expected. And you could be right because sometimes, the utility company can get it wrong when calculating your energy bills. But you can clear these doubts by calculating the electricity usage on your own. 

It is not difficult to learn how to read your electrical consumption. What you need is to learn a few hacks on how to figure out your energy usage for all your appliances and other electronic devices. Although technology is making it easy to estimate electric energy consumption, you can do a little calculation with a pen and paper and get quick results at zero cost. 

In this guide, we are providing you with some of the best tips on how to calculate electrical usage using an appliance-by-appliance breakdown. Here are the 5 main steps you should follow: 

Step 1: Find Wattage Of Your Devices 

The first step to calculating the electricity usage on your own is finding the wattage of all electrical devices in the house. That includes bulbs, microwaves, fridge, water heater, and air condition, among others. This is a pretty simple exercise because most manufacturers ensure that wattage figures on their products are easily seen.  

All machines have a label listing how many watts devices use. Most of the labels are either on the back or bottom of the device. If you cannot find the label anywhere on the device, then you need to look for its user manual, since these documents come with all the technical information about the product.  

If you can’t find the manual, check the manufacturer website. You can also contact the manufacturer. Any number that ends with “W” is what you should be looking for. If there is a range of wattage, take the largest number. 

Step 2: Find Out The Electrical Energy Used Per Day 

Now that you have the wattage of all appliances and other devices listed, the next step should be calculating electrical energy usage per day. What you have collected as of now is the energy usage per hour. This step should also be pretty simple because you have already done the hard work. The most important thing is the number of hours that the device is used per day. 

From your list, estimate the number of hours that each device. For example, how many hours do you watch TV? How many hours in a day do you use your microwave? Similarly, you need to know how many hours you use each bulb. That’s because security bulbs will have longer hours of use compared to your bedroom ones.  

Then multiply the number of hours used for each device with the watts. For example, if your coffee maker wattage is 1200W and you use for 3 hours in a day, then the electrical energy used per day is 1200W X 3 hours. This will give 3600Wh per day. Use the same formula for all other appliances and electronic devices. 

woman at home with electricity and convenience

Step 3: Convert Watts to kilowatts 

With the watts per day, now it’s time to convert daily energy consumption into kilowatts. This step is crucial because electrical energy consumption is measured in kilowatt. One kilowatt is equivalent to 1000 watts. So, to calculate kilowatts-hour for every device on your list, you just need to divide the watt-hour per day with 1000. 

Using our coffee maker as an example, we need to divide the 3600Wh by 1000. This should give us 3.6kWh. So, this means that the coffee maker consumes 3.6kWh per day. Use the same formula on all the other devices on your list. 

Step 4: Determine Kilowatts per month 

With the kWh consumption per day for every device, the next thing you need to do is to calculate monthly electrical energy consumption. This is pretty easy since you have all the figures that you need. All you have to do is to multiply the daily kWh for every device with 30 days. 

Using the coffee maker’s example, you need to multiply 3.6kW by 30 days (3.6kwh x 30). This should give you an electrical energy consumption of 33.6kWh per month for our coffee maker. Do the same for all other devices. 

Step 5: Figure the Monthly energy cost 

This should be the last stage of calculating the electricity usage on your own. All you have to do is to multiply the monthly kWh consumption for every device with the cost of one kWh to get the estimated monthly energy cost per device.  

If the utility company sells one kWh at 15 cents, then using our coffee maker example, we need to multiple 33.6kWh by 15 cents (33.6kWh x $0.15=$5.04). So, the $5.04 is the electrical energy cost of running the coffee maker or 30 days. Use this formula for all devices and add the costs to get the estimated electrical bill for your home.  

That’s how you can simply estimate your electricity bill. Although the final figure could have a margin of error, it will be enough to clear doubts on your electrical usage.