What Uses the Most Electricity in a Home? Biggest Loads Ranked

By Juan Molina · Updated · How we calculate

In most homes, three things use more electricity than everything else put together: cooling, heating and hot water. The appliances people worry about most, such as televisions, chargers and lights, are usually a small part of the bill.

Key points

  • Air conditioning is the largest use of electricity in U.S. homes, then space heating and water heating.
  • Cost is power multiplied by time: long running hours matter more than high wattage.
  • Compare a mild-month bill with a peak-month bill to see what climate control costs you.
Bar chart ranking twelve common household appliances by what they cost to run per month at the U.S. average electricity price
Typical monthly running cost of common appliances at the U.S. average price, July 2026.

The national picture

The Energy Information Administration surveys U.S. households every few years. In its most recent survey, the three largest uses of electricity in homes were:

End useShare of home electricity use
Air conditioning19%
Space heating12%
Water heating12%

Lighting and refrigerators, which are found in nearly every home, are the next two. About 89% of U.S. homes now use air conditioning, up from 57% in 1980, which is a large part of why summer bills have grown.

These are averages over the whole country. A home in Minnesota heated with gas and a home in Florida with electric everything have very different profiles, which is why each of our state pages describes what drives bills locally.

Appliances ranked by typical monthly cost

The chart above and the table on our appliances page rank common appliances by what they cost in a typical month at the U.S. average price. A few stand out:

Why wattage alone is misleading

Cost is power multiplied by time. An air fryer and a space heater both draw about 1,500 watts, but the air fryer runs for 20 minutes and the heater for hours. An electric kettle is one of the most powerful things you can plug into a wall outlet and one of the cheapest to use, because it finishes in four minutes.

The reverse is also true. A refrigerator draws little power but never stops, and a dehumidifier left on its continuous setting can quietly use more electricity than a clothes dryer.

AppliancePowerTypical timeEnergy
Electric kettle1,500 W4 minutes0.1 kWh
Air fryer1,500 W20 minutes0.5 kWh
Space heater1,500 W8 hours12 kWh
Refrigerator150 W8 hours of compressor time a day1.2 kWh
Dehumidifier500 W12 hours6 kWh

Seasonal loads and year-round loads

A monthly figure hides how many months an appliance is in use. Over a year, a modest load that never stops can outweigh a large one used for a season.

AppliancePer month in useMonths usedPer yearCost per year, U.S. average
Electric water heater405 kWh124,860 kWh$889.87
Central air conditioner840 kWh43,360 kWh$615.22
Space heater360 kWh41,440 kWh$263.66
Window air conditioner216 kWh3648 kWh$118.65
Refrigerator36 kWh12432 kWh$79.10

The months are examples; a Florida air conditioner runs for far more than four. The point is to multiply by the months that apply to you before deciding where to look for savings.

How to find your own biggest load

  1. Compare seasons. Take a mild spring or fall bill and a peak summer or winter bill. The difference is roughly your heating or cooling.
  2. Look at the base. The mild-month bill is everything that runs year-round: water heating, refrigeration, lighting, laundry, cooking and electronics.
  3. List the suspects. Use the calculator and add each large appliance to "My list". If the total falls well short of your base bill, something is running more than you think.
  4. Measure. A plug-in watt meter settles any doubt for appliances on a standard outlet. For hard-wired loads, many utilities show hourly use on their website or app.

What is usually not the problem

LED lighting, phone and laptop chargers, a modern television, a router and a microwave each cost a few dollars a month or less. They are worth good habits but will not explain a bill that has doubled. When a bill jumps, look first at heating, cooling and hot water, then at anything with a motor or heating element that could be stuck on.

Frequently asked questions

What appliance uses the most electricity?

In homes that have one, central air conditioning or an electric heating system. Across all U.S. homes, air conditioning accounts for about 19% of residential electricity use, more than any other single end use.

What runs up an electric bill the most?

Long running times on high-wattage equipment: air conditioners, heaters, water heaters, pool pumps and dehumidifiers. Short-burst appliances such as kettles and air fryers cost very little despite their high wattage.

How much electricity does the average home use?

863 kWh a month in 2024, according to the EIA, at an average bill of $142.26. State averages range from 495 kWh in Hawaii to 1,202 kWh in Louisiana.

Sources

Electricity prices are the EIA figures for July 2026. Wattages are typical values; check the label on your own appliance.

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