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Cost to run a window air conditioner in California
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$0.27/hour
Window Air Conditioner at 900 W in California (29.75¢/kWh) · $65.12/month at 8 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.27 | $8.14 | $97.73 |
| 2 h/day | $0.54 | $16.28 | $195.46 |
| 4 h/day | $1.07 | $32.56 | $390.92 |
| 8 h/day | $2.14 | $65.12 | $781.83 |
| 12 h/day | $3.21 | $97.68 | $1,172.75 |
| 24 h/day | $6.43 | $195.35 | $2,345.49 |
A 8,000-10,000 BTU window unit draws roughly 700-1,000 W while the compressor runs.
Same appliance, nearby states
| State | ¢/kWh | Per month |
|---|---|---|
| California | 29.75 | $65.12 |
| Rhode Island | 28.18 | $61.68 |
| New York | 28.65 | $62.71 |
| Alaska | 29.41 | $64.37 |
| Massachusetts | 30.48 | $66.71 |
| Maine | 32.11 | $70.28 |
| Hawaii | 47.18 | $103.27 |
FAQ
How much does it cost to run a window air conditioner in California?
At 900 W and 29.75¢/kWh: $0.27 per hour, $2.14 per day and $65.12 per month at 8 h/day.
How does California compare with other states?
The same use costs $27.84/month in Nevada (cheapest) and $103.27/month in Hawaii (most expensive); the US average is $39.75.
Price: EIA Electric Power Monthly, Table 5.6.A (residential, August 2026 preliminary; released October 23, 2026).
Window Air Conditioner cost calculator · Electricity cost in California
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