What actually uses the most electricity in a house

The ranking

These come from the EIA’s Residential Energy Consumption Survey, which measures what households actually consume rather than asking them to estimate. One property of the figures matters enormously and is almost always missed: they are conditional. The space-heating number is the average among homes that heat with electricity, not an average smeared across homes that burn gas. That is what makes them useful for a specific house, and it is why they do not sum to the total.

EIA RECS 2020, table CE4.6, all US homes, priced at the US average of 18.34¢/kWh. Conditional means, so they do not sum to the 10,566 kWh household total.

End use	Average a year	Cost	Measured among
Everything else	5,108 kWh	$937	Lighting, electronics, cooking, laundry, plug load
Water heating	2,706 kWh	$496	Among homes with an electric water heater
Space heating	2,484 kWh	$456	Among homes that heat with electricity
Air conditioning	2,318 kWh	$425	Among homes that run air conditioning
Refrigeration	839 kWh	$154	All homes — essentially universal

Why the intuition is wrong

Two things mislead. The first is visibility: you interact with lights and screens constantly and with the water heater never, so the things you touch feel like the things that cost. The second is wattage. A hair dryer is rated at 1,600 W and a refrigerator at 150 W, so the hair dryer feels like the expensive one — but wattage is a rate, not a quantity, and ten minutes a day against twenty-four hours a day settles it.

The rating column and the cost column are almost unrelated. The hours column is what decides.

Appliance	Rated	Hours a year	Costs a year
Hair dryer	1,600 W	62	$18
Refrigerator	150 W	8,760	$77
Electric kettle	1,500 W	55	$15
Electric water heater	4,500 W	8,760	$499
LED television	90 W	1,825	$31
Central air conditioner	3,500 W	1,080	$421

A hair dryer is rated more than ten times a refrigerator and costs a fraction as much to run. That single comparison is worth more than any list of energy-saving tips, because it tells you which question to ask: not “how many watts”, but “how many watt-hours”.

It depends heavily on where you live

A national ranking hides an enormous regional spread. Cooling barely registers in the marine Pacific Northwest and dominates the Gulf Coast; electric heating is the reverse.

EIA RECS 2020, census divisions. Conditional means throughout.

Census division	Total	Heating	Cooling	Water
East South Central	13,882 kWh	3,477 kWh	2,812 kWh	2,958 kWh
West South Central	13,609 kWh	2,482 kWh	3,873 kWh	2,766 kWh
South Atlantic	13,089 kWh	2,401 kWh	3,112 kWh	2,767 kWh
West North Central	10,705 kWh	3,472 kWh	1,728 kWh	2,870 kWh
Mountain	10,500 kWh	1,795 kWh	2,918 kWh	2,550 kWh
East North Central	9,345 kWh	2,919 kWh	1,425 kWh	2,673 kWh
Middle Atlantic	8,275 kWh	2,287 kWh	1,483 kWh	2,528 kWh
Pacific	7,665 kWh	1,864 kWh	1,514 kWh	2,588 kWh
New England	7,308 kWh	1,748 kWh	1,136 kWh	2,124 kWh

Your own state’s page uses its division’s figures rather than the national ones, and prices them at your state’s rate — which is the other half of the answer, since electricity costs several times more in some states than others.

How this ranking changed, and why the folklore lags

Most household energy advice was written for a house that no longer exists. Three shifts have rearranged the list within one generation, and the advice has not caught up with any of them.

Lighting collapsed. An incandescent bulb turned about 90% of its electricity into heat rather than light. LED replacements deliver the same light for roughly a sixth of the power, and lighting fell from a headline item to a modest one. Almost every “turn off the lights” article predates this.
Screens got bigger but far more efficient. A plasma television could draw 300 W; a larger LED set draws under 100. Meanwhile the number of screens per household rose, so the category is roughly flat rather than falling.
Standby was regulated down. Idle draw that used to be measured in tens of watts per device is now typically one or two, which is why the vampire-power statistic has aged so badly. The arithmetic on that is here.

What did not change is heating, cooling and hot water. Those are set by physics — the temperature difference you are maintaining and the mass of water you are warming — and no efficiency improvement has moved them out of the top three. That is why the ranking looks so different from the advice.

The single-appliance ranking

End uses are the right way to think about a bill. But people own appliances, not end uses, so here is the same question answered at the level of individual devices.

The fifteen most expensive things to run on this site, at 18.34¢/kWh. Not every household has every one — that is the point of the list.

Appliance	A year	Cost	Average draw
Crypto mining rig	26,280 kWh	$4,820	3000 W
Electric furnace	9,012 kWh	$1,653	3755 W
EV charging (Level 1 wall socket)	3,747 kWh	$687	1403 W
EV charging (Level 2 home)	3,541 kWh	$649	7241 W
Hot tub	3,285 kWh	$602	375 W
Pool heat pump	3,139 kWh	$576	3270 W
Electric water heater	2,720 kWh	$499	311 W
Heat pump (heating)	2,307 kWh	$423	999 W
Central air conditioner	2,295 kWh	$421	2125 W
Pool pump	2,160 kWh	$396	1500 W
Oxygen concentrator	2,044 kWh	$375	350 W
Grow light	1,755 kWh	$322	301 W
Standalone ice maker	1,380 kWh	$253	158 W
Koi pond pump	1,314 kWh	$241	150 W
Wine cellar cooling unit	1,301 kWh	$239	149 W

Note what is not near the top: nothing you switch on and off deliberately. The expensive things run unattended, hold a temperature, or both. The full list of all 120 is here.

What this means you should actually do

Find out what your water heater is. If it is electric, it is probably your second-largest line and you have never thought about it. A heat pump water heater cuts it by roughly two thirds.
Check whether your heating is using backup resistance heat. On a heat pump this is the single most common cause of a bill that triples in January, and it produces no warning of any kind.
Move the thermostat before you change any equipment. Each degree is worth roughly 3–5% of that end use, and it costs nothing.
Only then look at the small stuff. Lighting and electronics are worth doing and will not solve a large bill on their own.

Questions

What uses the most electricity in a home?

Space heating, water heating and air conditioning, in whichever order your climate and equipment dictate. In a home using electricity for all three they are roughly two thirds of the bill. Refrigeration is the largest single always-on appliance but is far smaller than any of those three.

Do lights use a lot of electricity?

Not any more. Lighting was a significant share of a household bill when incandescent bulbs were universal; LED replacements use about a sixth as much for the same light, and lighting has fallen to a small fraction of a typical bill. It is still worth switching lights off, but it will not fix a bill that has doubled.

Does leaving things plugged in use much electricity?

Less than the advice suggests. A realistic whole-house always-on load is 50–100 W, which is real money over a year but nowhere near the quarter-of-your-bill figure often quoted. The devices worth attention are the ones with a pump, a compressor or a heating element, not chargers.

Is it cheaper to use gas than electricity?

For heating and hot water, usually yes on a pure fuel-cost basis in most of the US, because gas is cheaper per unit of energy delivered. The exception is a heat pump, which delivers two to four units of heat per unit of electricity and can beat gas outright depending on the local price ratio. For cooking the difference is small either way.

All guides · How the figures are computed · Break down your own bill