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How Much Does a Window AC Unit Cost to Run?

A standard window air conditioning unit (8,000–10,000 BTU) draws around 1,200 watts. Larger units for bigger rooms can use up to 1,500 watts.

watts
hrs/day
$/kWh

Daily Cost

$1.54

9.6 kWh

Monthly Cost

$46.08

288.0 kWh

Yearly Cost

$560.64

3504.0 kWh

For perspective...

At $560.64/year, this is a significant energy cost — equivalent to about 11 monthly grocery trips. Consider efficiency upgrades.

Energy-Saving Tips for Your Window AC Unit

  • Clean the filter monthly to maintain efficiency
  • Use a timer so it's not running while you're out
  • Keep curtains closed on sun-facing windows to reduce cooling load

Other Heating & Cooling Appliances

Space Heater

1,500W typical

Central Air Conditioner

3,500W typical

Ceiling Fan

75W typical

Portable Air Conditioner

1,400W typical

Electric Furnace

10,000W typical

Dehumidifier

600W typical