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Cost to run a central air conditioner in Maryland
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$0.75/hour
Central Air Conditioner at 3,500 W in Maryland (21.40¢/kWh) · $182.16/month at 8 h/day
By hours of use
| Use | Per day | Per month | Per year |
|---|---|---|---|
| 1 h/day | $0.75 | $22.77 | $273.38 |
| 2 h/day | $1.50 | $45.54 | $546.77 |
| 4 h/day | $3.00 | $91.08 | $1,093.54 |
| 8 h/day | $5.99 | $182.16 | $2,187.08 |
| 12 h/day | $8.99 | $273.24 | $3,280.62 |
| 24 h/day | $17.98 | $546.47 | $6,561.24 |
A 3-ton central AC typically draws 3,000-4,000 W while running; SEER rating and duct losses matter.
Same appliance, nearby states
FAQ
How much does it cost to run a central air conditioner in Maryland?
At 3,500 W and 21.40¢/kWh: $0.75 per hour, $5.99 per day and $182.16 per month at 8 h/day.
How does Maryland 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 Maryland
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