Cost to Run a Window Air Conditioner in Delaware
Delaware's average residential electricity rate is 18.5¢/kWh as of July 2026 — the 33rd cheapest in the country, 1% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $40.49 per month.
Per hour
$0.17
at 500–1,500 W
Per day
$1.33
8 hours/day
Per month
$40.49
219 kWh
Per year
$486
2,628 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.67 | $20.25 | $243 |
| Typical (8 hrs/day) | $1.33 | $40.49 | $486 |
| Heavy (16 hrs/day) | $2.66 | $80.99 | $972 |
Delaware 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 Delaware?
At Delaware's current average residential rate of 18.5¢/kWh (July 2026), a window air conditioner with typical usage costs about $1.33 per day, $40.49 per month, or $486 per year.
Is running a window air conditioner in Delaware more expensive than average?
It's almost exactly the U.S. average: $40.49 per month here versus $40.06 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 18.5¢ per kWh as of July 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.