This calculator is designed to help you estimate the cost of running your household appliances. To use it, simply select your country, the currency you use, and the appliance you want to estimate the cost for. Enter the power consumption of the appliance in either watts or kilowatts and select the corresponding unit. Next, enter the cost of one unit of electricity in your currency. The calculator will automatically calculate and display the cost per day, month, and year of running the selected appliance. If you need to make adjustments, simply update the fields and click the “Calculate” button again. Use the “Reset” button to start over.
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Power consumption calculator ►
Note: This calculator assumes there are 30 days in a month and 365 days in a year on average.
kWh Cost Calculation
Energy Consumption Calculation
The energy E in kilowatt-hours (kWh) per day is equal to the power P in watts (W) times number of usage hours per day t divided by 1000 watts per kilowatt:
E(kWh/day) = P(W) × t(h/day) / 1000(W/kW)
Electricity Cost Calculation
The electricity cost per day in dollars is equal to the energy consumption E in kWh per day times the energy cost of 1 kWh in cents/kWh divided by 100 cents per dollar:
Cost($/day) = E(kWh/day) × Cost(cent/kWh) / 100(cent/$)
Amount of Energy Used by Common Appliances
Here is a table showing the estimated wattage of common household appliances based on reputable sources:
| Common appliances | Estimated wattage (W) |
|---|---|
| Air conditioner (central) | 3500 – 5000 |
| Air conditioner (window) | 500 – 1440 |
| Blender | 300 – 1000 |
| Clothes dryer (electric) | 3000 – 6000 |
| Coffee maker | 800 – 1400 |
| Computer (desktop) | 60 – 300 |
| Dishwasher | 1200 – 2400 |
| Electric kettle | 1500 – 1800 |
| Electric oven (single) | 2000 – 5000 |
| Electric range | 2000 – 5000 |
| Electric water heater | 3000 – 4500 |
| Fan (ceiling) | 50 – 75 |
| Fan (portable) | 50 – 100 |
| Freezer (chest) | 100 – 200 |
| Freezer (upright) | 150 – 250 |
| Hair dryer | 1200 – 1875 |
| Iron | 1000 – 1800 |
| Laptop | 50 – 100 |
| Microwave oven | 600 – 1500 |
| Refrigerator (frost-free) | 725 – 1100 |
| Refrigerator (top-freezer) | 350 – 600 |
| Refrigerator (bottom-freezer) | 450 – 800 |
| Space heater (electric) | 750 – 1500 |
| Television (CRT) | 120 – 180 |
| Television (LCD) | 150 – 400 |
| Television (LED) | 50 – 150 |
| Toaster | 800 – 1500 |
| Toaster oven | 1200 – 1800 |
| Vacuum cleaner (upright) | 600 – 1200 |
| Vacuum cleaner (canister) | 1000 – 2000 |
| Washing machine (top-load) | 350 – 500 |
| Washing machine (front-load) | 200 – 500 |
| Water pump | 250 – 1000 |
| Water heater (gas) | 3000 – 4000 |
| Water heater (electric) | 3000 – 5500 |
| Wi-Fi router | 2.5 – 12 |
| Window fan | 40 – 100 |
| Xbox One | 110 – 245 |
| PlayStation 5 | 90 – 150 |
Note that these estimates are meant to give a general idea of the energy usage of common household appliances and may vary depending on the specific model and usage habits. Additionally, some appliances may have a range of estimated wattage depending on factors such as size and power settings.
Note – The data used in the table is based on estimates from reputable sources, including the U.S. Department of Energy, ENERGY STAR, and the California Energy Commission.
