Energy Cost Calculator
Add the required inputs to this energy cost calculator and calculate the cost in seconds.
Use the energy cost calculator to estimate the electricity cost of running different appliances in no time.
Energy Consumption Calculation Formula:
$$ E\;(\text{kWh/day}) = \frac{P\;(\text{W}) \times t\;(\text{h/day})}{1000} $$
Energy Cost Formula:
$$ \text{Cost}\;(\$/\text{day}) = \frac{E\;(\text{kWh/day}) \times \text{Cost}\;(\text{cent/kWh})}{100} $$
The most convenient and reliable way to calculate the energy cost is the power cost calculator. Because it just requires a few inputs and provides you with the precise cost of electricity.
How to Calculate Energy Cost?
Follow the below-mentioned steps to calculate the energy cost:
- Determine the energy price
- Calculate the power consumed by the appliance
- Now multiply the energy price by the power consumption of the appliance as we have done in the following example
Example:

Let’s go through an example of energy cost calculation for a household appliance, such as a refrigerator, using the following information:
- Appliance: Refrigerator
- Power Consumption: \(150 \text{ W}\)
- Daily Usage: \(12 \text{ hours/day}\)
- Number of Days Used per Month: \(30 \text{ days}\)
- Unit of Measurement: Kilowatt-hours (kWh)
- Cost per kWh: \(0.12 \text{ USD}\)
Solution:
Step 1: Calculate daily energy consumption
$$ E_{\text{daily}} = \frac{P \times t}{1000} $$
$$ E_{\text{daily}} = \frac{150 \times 12}{1000} = 1.8 \text{ kWh/day} $$
Step 2: Calculate monthly energy consumption
$$ E_{\text{monthly}} = E_{\text{daily}} \times D $$
$$ E_{\text{monthly}} = 1.8 \times 30 = 54 \text{ kWh} $$
Step 3: Calculate monthly energy cost
$$ \text{Cost} = E_{\text{monthly}} \times R $$
$$ \text{Cost} = 54 \times 0.12 = 6.48 \text{ USD} $$
Result: Running a refrigerator that consumes \(150 \text{ W}\) for \(12\) hours a day over \(30\) days will cost approximately \$6.48 per month.
If you don’t want to perform the calculations manually, simply use an energy consumption calculator—it delivers results in seconds.
How Does Our Energy Cost Calculator Work?
With this energy cost estimator, you can easily find the cost of running an electric appliance for a specific duration. Let’s see how it works:
What Do You Need to Enter?
- Typical Appliance: The specific appliances for which you want to know the energy cost
- Power Consumption: Amount of energy that the selected appliance consumes
- Hours of Use Per Day: The total hours the appliance runs in a day
- 1 Kilowatt-Hour (kWh) Cost: The cost of energy in your country
This is What You Will Get!
- Energy Cost Per Day: The daily cost of running the appliance
- Energy Cost Per Month: The cost that you will have to pay after running it for a month
- Cost of Energy Per Year: This is the annual cost of energy that your appliance is consuming in a year
Through this power cost calculator, you can calculate the energy consumed by the appliances of your home, offices, or any commercial unit and can make the right decision regarding the use of energy.
Power Consumption of Common Appliances:
In the following table, we have provided the consumption of various electrical appliances.
| Common appliances | Estimated wattage (W) |
| Home appliances: | |
| Air Conditioner (HVAC) | 2500-10000 |
| Air conditioner (window unit) | 1500-5000 |
| Heater (home) | 5000-20000 |
| Heater (portable) | 750-2000 |
| Humidifier | 25-350 |
| Dehumidifier | 200-750 |
| Fan (ceiling, table) | 15-200 |
| Light bulb (LED) | 3-25 |
| Light bulb (incandescent) | 15-200 |
| Electric water heater | 3000-6600 |
| Kitchen appliances: | |
| Refrigerator | 500-1000 |
| Electric range/oven | 2000-5000 |
| Electric cooktop/stove | 750-5000 |
| Microwave oven | 750-1500 |
| Dishwasher | 1200-2000 |
| Coffee maker | 600-1200 |
| Toaster | 750-1500 |
| Electric kettle | 1000-2000 |
| Electric cooker | 160-1500 |
| Other appliances: | |
| Electric vehicle charger | 1,500-20,000 |
| Television | 25-500 |
| Washing machine | 400-1500 |
| Clothes dryer | 1800-5000 |
| Clothes iron | 750-2000 |
| Hair dryer | 750-2000 |
| Desktop computer | 100-250 |
| Laptop computer | 35-150 |
| Smart phone charger | 5-25 |
| Water pump/motor | 750-2000 |
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