Window Air Conditioner Running Cost Calculator
Typical draw about 1100 W. Enter your hours and rate to estimate the monthly and yearly running cost.
WattCost runs every calculation in your browser — your usage and rates never leave this page.Try: Power (watts)=1100, Hours per day=3, Days per month=30, Electricity rate=0.15 → 99.00 kWh, $14.85, $178.20
How to use
Enter the wattage (pre-filled to about 1100 W, the typical draw for a Window Air Conditioner), set how many hours per day it runs, and add your electricity rate. WattCost multiplies watts ÷ 1000 × hours × days to get kWh, then multiplies by your rate for the cost.
Every °F lower can raise cost ~3%; set 78°F (25°C) and pair with a fan to trim it.
FAQ
How much does it cost to run a Window Air Conditioner per month?
At about 1100 W, with 3 hours a day at $0.15/kWh, a Window Air Conditioner costs roughly $14.85 per month. Your real number depends on how many hours you use it and your local rate — enter your own figures for an exact estimate.
Does a Window Air Conditioner use power when it is off?
Most devices draw a small standby load. Unplug the Window Air Conditioner or put it on a switched outlet to stop the trickle when it is not in use.
How can I lower my Window Air Conditioner running cost?
Every °F lower can raise cost ~3%; set 78°F (25°C) and pair with a fan to trim it. You can also shop your electricity rate — even a small drop per kWh lowers every appliance on this site.