Is a portable air conditioner expensive to run?

If the window allows it, a window unit cools the same room with meaningfully less electricity. At typical use it adds about $44.11 to a monthly electric bill at the US-average rate, but that swings from $30.81 in the cheapest states to $114.72 in the most expensive.

How many watts does a portable air conditioner use?

Portable Air Conditioner typically draws about 1,100 running watts. Because it has a motor or compressor, it briefly spikes to around 1,800 watts at startup, which matters for generator and breaker sizing but not for energy cost. Check the nameplate or label on your specific unit for its exact rating.

How much electricity (kWh) does a portable air conditioner use?

At typical use (1,100 W for 8 hours a day), a portable air conditioner uses about 8.8 kWh per day — roughly 268 kWh per month, or about 31% of what the average US home uses in a month (863 kWh). Energy used doesn't depend on your electricity rate — only the bill does.

How can I lower the cost of running a portable air conditioner?

If the window allows it, a window unit cools the same room with meaningfully less electricity. You can also cut the cost by lowering your electricity rate — many utilities offer cheaper off-peak hours — or simply by running it fewer hours. The calculator on this page shows how changing hours per day or your electricity rate moves the number.

How Much Does It Cost to Run a Portable Air Conditioner?

Portable ACs are the least efficient way to cool: single-hose units pull conditioned air out of the room, forcing longer runtimes for the same comfort. At the US-average rate of 16.5¢/kWh, running a portable air conditioner costs about $44.11/month ($529.34/year) at typical use. Adjust the watts, hours, and your rate below for your exact number.

Power (watts)

Hours per day: 8

Days per week: 7

Your state (sets the rate)

Electricity rate ($/kWh)

Cost to run a portable air conditioner

$529/yr

Per day: $1.45
Per month: $44.11
Energy per year: 3,212 kWh

Cost = power (kW) × hours × days × your rate. Defaults are typical values — enter your appliance's actual watts (often on a label) and your real rate for a precise figure.

How much electricity does a portable air conditioner use?

At 1,100 W for 8 hours a day, a portable air conditioner uses about 8.8 kWh per day — roughly 268 kWh per month and 3,212 kWh per year. That's about 31% of the 863 kWh the average US home uses in a month. Energy use is the same everywhere — only the price per kWh changes your bill.

Wondering about the circuit instead? See how many amps a portable air conditioner draws.

Cost to run a portable air conditioner by electricity rate

Same 1,100 W appliance, 8 h/day — the bill changes with where you live.

Scenario	Rate	Per month	Per year
Cheapest states (North Dakota)	11.5¢	$30.81	$369.70
US average	16.5¢	$44.11	$529.34
Most expensive (Hawaii)	42.9¢	$114.72	$1,376.66

Find your state's rate on the electricity rates by state page, or see the appliance wattage chart for more devices.

Frequently asked questions

At the US-average residential rate of 16.5¢/kWh, a portable air conditioner drawing 1,100 watts for about 8 hours a day costs roughly $1.45 per day, $44.11 per month, and $529.34 per year. Your actual cost depends on your electricity rate and how much you use it, and the calculator on this page adjusts for both.

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How Much Does It Cost to Run a Portable Air Conditioner?

How much electricity does a portable air conditioner use?

Cost to run a portable air conditioner by electricity rate

Frequently asked questions