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Cost to run a central air conditioner in Connecticut
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$0.86/hour
Central Air Conditioner at 3,500 W in Connecticut (24.51¢/kWh) · $208.63/month at 8 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.86 | $26.08 | $313.12 |
| 2 h/day | $1.72 | $52.16 | $626.23 |
| 4 h/day | $3.43 | $104.31 | $1,252.46 |
| 8 h/day | $6.86 | $208.63 | $2,504.92 |
| 12 h/day | $10.29 | $312.94 | $3,757.38 |
| 24 h/day | $20.59 | $625.89 | $7,514.77 |
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 |
|---|---|---|
| Connecticut | 24.51 | $208.63 |
| Pennsylvania | 21.77 | $185.31 |
| Michigan | 22.99 | $195.69 |
| Vermont | 23.84 | $202.93 |
| New Jersey | 24.61 | $209.48 |
| District of Columbia | 25.98 | $221.14 |
| New Hampshire | 27.64 | $235.27 |
FAQ
How much does it cost to run a central air conditioner in Connecticut?
At 3,500 W and 24.51¢/kWh: $0.86 per hour, $6.86 per day and $208.63 per month at 8 h/day.
How does Connecticut 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 Connecticut
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