Electricity use guide
How much does a window air conditioner cost to run?
Using a planning draw of 1,000 watts for 4.2 hours a day, this example uses 4.20 kWh daily. At the June 2026 U.S. residential average of $0.1834 per kWh, that is about $0.77 per day or $281.15 per year.
- Daily electricity
- 4.20 kWh
- Monthly cost
- $23.43
- Annual electricity
- 1533.0 kWh
- Annual cost
- $281.15
Calculation for this example
1,000 W ÷ 1,000 × 4.2 hr/day × 365 days × $0.1834/kWh = $281.15/yearElectricity use in kilowatt-hours equals watts divided by 1,000, multiplied by runtime. Cost equals that energy use multiplied by the price per kWh.
What changes the actual cost?
- Thermostat settings, room or tank temperature, climate, insulation, and equipment condition change how often the unit cycles.
- Use equivalent full-power hours rather than total plugged-in hours when the compressor or heating element switches on and off.
The example is a labeled planning estimate, not a specification for every model. Its national average rate includes fixed-charge and tax revenue; no separate fees are added. It is not the exact additional charge for using this appliance on your tariff.
Get a result for your appliance
Enter the wattage from your appliance label, your typical schedule, and the electricity rate from your bill. The calculator shows daily and annual energy, cost, source details, and the arithmetic used.
Calculate your window air conditioner cost