Appliance Electricity Cost
Estimate how much your appliances cost to run: kWh and cost per appliance and in total, per month and per year.
Typical power and use of the presets
| Appliance | Power (W) | Hours a day |
|---|---|---|
| Refrigerator | 150 | 10.00 |
| Freezer | 200 | 10.00 |
| Air conditioner (9,000 BTU/h) | 900 | 8.00 |
| Air conditioner (12,000 BTU/h) | 1,200 | 8.00 |
| Electric shower | 5,500 | 0.50 |
| Electric water heater | 4,500 | 3.00 |
| Washing machine | 500 | 1.00 |
| Clothes dryer | 3,000 | 1.00 |
| Dishwasher | 1,500 | 1.00 |
| Microwave oven | 1,200 | 0.25 |
| Electric oven | 2,400 | 0.50 |
| Induction cooktop | 2,000 | 1.00 |
| Electric kettle | 2,000 | 0.25 |
| Coffee maker | 800 | 0.50 |
| Television (LED) | 100 | 5.00 |
| Desktop computer | 200 | 8.00 |
| Laptop | 60 | 8.00 |
| Game console | 150 | 2.00 |
| Wi-Fi router | 10 | 24.00 |
| LED bulb | 9 | 6.00 |
| Ceiling fan | 75 | 8.00 |
| Space heater | 1,500 | 4.00 |
| Hair dryer | 1,500 | 0.25 |
| Clothes iron | 1,200 | 0.50 |
| Vacuum cleaner | 1,200 | 0.50 |
| Electric car charger (7.4 kW) | 7,400 | 2.00 |
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Frequently asked questions about electricity costs
How do I calculate how much an appliance consumes?
Multiply the power in watts by the hours of use and divide by 1,000 to get kWh. A 1,200 W air conditioner used 6 hours a day for 20 days uses 1,200 × 6 × 20 ÷ 1,000 = 144 kWh a month.
Where do I find the power of an appliance?
On the label or plate on the back or bottom of the appliance, in its manual, or on its energy label. Chargers and adapters show the maximum, not the usual consumption.
What are the tariff flags in Brazil?
They are monthly surcharges set by ANEEL when power generation costs more: the green flag adds nothing, and the yellow and red flags add a fixed amount for every kWh consumed.
Why is my bill higher than the estimate?
Bills add taxes, public lighting and minimum or standing charges, and appliances in standby also consume. Enter the fixed charges and use the price per kWh with taxes from your bill.
How the electricity cost calculator works
This calculator estimates what your appliances cost to run. Build a list of up to 20 appliances, either by picking a preset with its typical power and daily use or by typing the watts printed on the label, and set the quantity, the hours a day and the days a month. The page returns the consumption in kWh and the cost of each appliance and of the whole list, per month and per year, in the currency you choose, plus a chart showing which appliances use the most. It is useful for households checking a bill, for people comparing a new appliance with an old one, and for Brazilian consumers who want to see how the tariff flag changes the month.
The consumption of each appliance is its power in watts times the quantity, times the hours a day, times the days a month, divided by 1,000 to give kWh. With a single price the energy cost is the total kWh times the price per kWh. With a tiered tariff each block of the month's kWh is charged at its own price: the first block at the tier 1 price, the next at the tier 2 price and the rest at the tier 3 price. In Brazil, ANEEL tariff flags add R$ 1.885, R$ 4.463 or R$ 7.877 per 100 kWh for the yellow flag, red level 1 and red level 2, values in force in 2026, and they apply only with the Brazilian real. Fixed charges are added to the month and a year is twelve equal months.
Example: a refrigerator uses 45 kWh a month, a television 14.4 kWh, eight LED bulbs 10.8 kWh and a 12,000 BTU/h air conditioner 144 kWh, which adds up to 214.2 kWh a month. At US$ 0.18 per kWh the energy costs US$ 38.56; with US$ 12.00 of fixed charges the month costs US$ 50.56 and the year US$ 606.67. The air conditioner alone accounts for 67.23% of the consumption. Limitations: the calculator does not model thermostat cycles, standby consumption, taxes, seasonal use or time-of-use tariffs, so treat the result as an estimate and compare it with your own bill.