Central air can cool an entire home quickly, but it can also become one of the biggest electricity costs on a summer bill when it runs for long stretches.
Start with a realistic overnight cooling example, then adjust the wattage, runtime, and electricity rate to match your own home and climate.
Example estimate
That usage pattern adds up to about $1,411.20 per year.
Central air cost can change fast when the compressor runs for more hours or when your local electricity price is higher than average. Even a small change in overnight runtime can noticeably move the monthly total.
If you are deciding whether you can get by with a fan overnight or a smaller room unit, comparison mode makes the monthly gap obvious before the next hot stretch arrives.
It can be. Whole-home cooling often uses far more electricity than small plug-in appliances, especially during heat waves or long overnight runs.
Use the system specs if you have them. If not, a 3500 watt example gives you a practical starting point for a heavier-duty cooling estimate.
Yes. Once you enter the values, WattWise shows estimated yearly running cost automatically.