Cost to run a central air conditioner
Short answer
Running a central air conditioner (~3500W, ~6 hrs/day) costs about $3.53/day, $107/month, or $1,288/year at the U.S. average of 16.8¢/kWh.
Wattage
3500 W
Per day
$3.53
Per month
$107
Per year
$1,288
Figures assume ~3500W for ~6 hours a day at the U.S. average 16.8¢/kWh. Your state's rate and your real usage change the total — enter both in the calculator.
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Frequently asked questions
How much does it cost to run a central air conditioner?
About $3.53 per day, $107 per month, or $1,288 per year at the U.S. average of 16.8¢/kWh, assuming ~3500W for ~6 hours a day.
How many watts does a central air conditioner use?
A typical central air conditioner draws about 3500 watts when running. Your model may differ — check its label or a plug-in power meter and enter the real number in the calculator.
How can I cut the cost of running a central air conditioner?
Run it less, use a more efficient model, and check whether your utility offers cheaper off-peak (time-of-use) rates. Costs also vary 4× by state, so your local rate matters a lot.