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Cost to run a central air conditioner in California
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$1.04/hour
Central Air Conditioner at 3,500 W in California (29.75¢/kWh) · $253.23/month at 8 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $1.04 | $31.65 | $380.06 |
| 2 h/day | $2.08 | $63.31 | $760.11 |
| 4 h/day | $4.17 | $126.62 | $1,520.22 |
| 8 h/day | $8.33 | $253.23 | $3,040.45 |
| 12 h/day | $12.49 | $379.85 | $4,560.67 |
| 24 h/day | $24.99 | $759.70 | $9,121.35 |
A 3-ton central AC typically draws 3,000-4,000 W while running; SEER rating and duct losses matter.
Same appliance, nearby states
| State | ¢/kWh | Per month |
|---|---|---|
| California | 29.75 | $253.23 |
| Rhode Island | 28.18 | $239.87 |
| New York | 28.65 | $243.87 |
| Alaska | 29.41 | $250.34 |
| Massachusetts | 30.48 | $259.45 |
| Maine | 32.11 | $273.32 |
| Hawaii | 47.18 | $401.60 |
FAQ
How much does it cost to run a central air conditioner in California?
At 3,500 W and 29.75¢/kWh: $1.04 per hour, $8.33 per day and $253.23 per month at 8 h/day.
How does California compare with other states?
The same use costs $108.27/month in Nevada (cheapest) and $401.60/month in Hawaii (most expensive); the US average is $154.58.
Price: EIA Electric Power Monthly, Table 5.6.A (residential, August 2026 preliminary; released October 23, 2026).
Central Air Conditioner cost calculator · Electricity cost in California
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