Cost to Run a Evaporative (Swamp) Cooler 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 evaporative (swamp) cooler here costs $18.29 per month.
Per hour
7.5¢
at 100–800 W
Per day
$0.60
8 hours/day
Per month
$18.29
97 kWh
Per year
$220
1,168 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.30 | $9.14 | $110 |
| Typical (8 hrs/day) | $0.60 | $18.29 | $220 |
| Heavy (16 hrs/day) | $1.20 | $36.58 | $439 |
Delaware vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a evaporative (swamp) cooler in Delaware?
At Delaware's current average residential rate of 18.8¢/kWh (April 2026), a evaporative (swamp) cooler with typical usage costs about $0.60 per day, $18.29 per month, or $220 per year.
Is running a evaporative (swamp) cooler in Delaware more expensive than average?
It's almost exactly the U.S. average: $18.29 per month here versus $18.29 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.