Cost to Run a Window Air Conditioner in Delaware
Delaware's average residential electricity rate is 18.8¢/kWh as of April 2026 — the 33rd cheapest in the country, 0% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $41.15 per month.
Per hour
$0.17
at 500–1,500 W
Per day
$1.35
8 hours/day
Per month
$41.15
219 kWh
Per year
$494
2,628 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.68 | $20.57 | $247 |
| Typical (8 hrs/day) | $1.35 | $41.15 | $494 |
| Heavy (16 hrs/day) | $2.71 | $82.30 | $988 |
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 18.8¢/kWh (April 2026), a window air conditioner with typical usage costs about $1.35 per day, $41.15 per month, or $494 per year.
Is running a window air conditioner in Delaware more expensive than average?
It's almost exactly the U.S. average: $41.15 per month here versus $41.15 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 18.8¢ per kWh as of April 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.