Cost to Run a Window Air Conditioner in Maryland
Maryland's average residential electricity rate is 21.8¢/kWh as of May 2026 — the 37th cheapest in the country, 18% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $47.72 per month.
Per hour
$0.20
at 500–1,500 W
Per day
$1.57
8 hours/day
Per month
$47.72
219 kWh
Per year
$573
2,628 kWh
By usage level in Maryland
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.78 | $23.86 | $286 |
| Typical (8 hrs/day) | $1.57 | $47.72 | $573 |
| Heavy (16 hrs/day) | $3.14 | $95.43 | $1,146 |
Maryland vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a window air conditioner in Maryland?
At Maryland's current average residential rate of 21.8¢/kWh (May 2026), a window air conditioner with typical usage costs about $1.57 per day, $47.72 per month, or $573 per year.
Is running a window air conditioner in Maryland more expensive than average?
Yes. Maryland's electricity costs about 18% more than the U.S. average, so the same usage costs $47.72 per month here versus $40.27 nationally.
What does electricity cost in Maryland right now?
Maryland residents pay an average of 21.8¢ per kWh as of May 2026 — the 37th cheapest rate of the 51 U.S. jurisdictions we track.