How To Calculate Your Electricity Bill. Electric Bill Calculator with Examples

Electrical Technology

Calculate Your Electricity Bill in 1 Minute with a Simple Calculation or by Using an Electric Energy Bill Calculator

Calculating electricity bills and tariffs is straightforward for electrical engineering students and professionals. However, it can be confusing for non-technical individuals who are concerned about their electric charges from electricity service providers.

Below is a simple example and calculation for an electricity bill. By following this tutorial, you will be able to easily calculate your electricity bill. Additionally, we have included a very useful electrical energy and electricity bill calculator for easy calculation of electric power consumption.

How To Calculate Your Electricity Bill Simple Calculation.

Example:

Suppose a consumer uses a 1000-watt load per hour daily for one month. Calculate the total energy bill of the consumer if the per-unit rate is 9 (in $, £, €, INR, Rs, DHR, Riyal, etc.). [Assume 1 month = 30 days].

Solution:

1 Unit = 1kWh.

So the Total kWh = 1000 Watts x 24 Hrs x 30 Days = 720000 … Watts / hour.

We want to convert it into electric units, Where 1 Unit = 1kWh.

So the total consumed units by user: = 720000 / 1000 … (k = kilo =1000).

Total Consumed Units = 720.

The cost of per unit electricity is 9.

Therefore, the total Cost of Electricity Bill = 720 units x 9 = 6480. (In $, £, €, ¥, INR “₹”, Rs, Peso, AED “Dirham”, SAR “Riyal” etc. or any other currency).

Note: If the unit cost of electricity is in cents, pence, or pennies, etc., simply divide the overall cost by 100 to get the amount in USD ($), Pounds (£), or any other currency, etc.

That’s it. You have Done :)

Electricity Bill Calculator

Select Country:
Typical Appliance:
Power Usage:
Hours of Use per Day:		Hours / Day
1 Unit “kilowatt-hour (kWh)” Cost:

Energy Cost per Day:
Energy Cost per Month:
Energy Cost per Year:

Electric Utility Bill Calculation

Calculation of Electric Energy Consumption

The following formula is used for electrical energy consumption.

E = P x t … (Wh)

E = P x t ÷ 1000 … (kWh)

Consumed Energy = Energy Used in Watts x Time in Hours

Where:

E = Electrical Energy (Consumed in kWh)
P = Power in Watts
t = Time in hours per day

Wh (Watt-hour) is a small unit, so we divide the consumed energy on 1000 to get the value of energy in kWh instead of Wh.

Example:

Consumed Energy = 2kW x 5 Hours = 10kWh

Calculation of Cost of Electricity and Bill Estimation

The following formula can be used as electric bill estimator per hour in dollars or other local currency.

Cost of electricity per hour = Consumed Energy in kWh x Cost of 1 Unit electricity

Cost Per Hour = kWh x Unit Price

E = P x t … (Wh)

E = P x t ÷ 1000 … (kWh)

Energy Cost = Energy Used in kWh x Time in Hours

Example:

Cost Per Hour = 5kWh x .50 Cents per unit = $2.5

Good To Know:

A question has been raised about why we multiplied the total consumed watts by 24, even though the daily rate is already provided. It’s important to note that the given rate is not for daily rates but for the cost per unit of electricity, where 1 unit is equivalent to 1 kilowatt-hour (kWh), also known as 1 B.T.U (Board of Trade Unit).

Good to know: 1 Board of Trade Unit = 1 B.O.T Unit = 1kWh = 1000Wh = 36 x10⁵ … Joule or Watt-seconds = 3.6 MJ

For instance, if you switch on a 1000-watt bulb for 1 hour, it means you have consumed 1000 watts for an hour, i.e., 1000 watts for 1 hour = 1 kWh = 1 unit of energy. So, if the rate for one unit is $5, then you will have to pay $5 as the electric bill for your lighted bulb, which has consumed 1000 watts for one hour = 1 kWh = 1 unit of electricity.

Power Consumption of Typical Home Appliances in Watts

The following table shows the estimated value of wattage rating (in Watts) for different and common household devices, appliances and equipment.

Electrical Appliance	Power Wattage in Watts “W”
Fan	80
LED Light Bulb	25
AC – Air Conditioner	900
Refrigerator	250
Electric Heater	2000
Water Heater	4000
Hair Dryer	1500
Clothes Dryer	3000
Clothes Iron	1400
Dishwasher	1300
Electric Kettle	1700
Toaster Oven	1100
Microwave Oven	1000
Desktop Computer	150
Laptop Computer	100
TV – Television	120
Stereo Receiver	300
Vacuum Cleaner	1200
Washing Machine	1500
Coffee Machine	1000
Blender	500
Water Pump	800
Sewing Machine	100
Thankless Water Heater	15000

Isn’t it easy to calculate your electricity bill? If you encounter any difficulties with your calculation or require additional information about your custom (home, residential, or commercial) electricity bill, please let us know in the comment box below. We will assist you accordingly.