Cost to Run a Electric Water Heater in Hawaii
Hawaii's average residential electricity rate is 46.6¢/kWh as of April 2026 — the 51st cheapest in the country, 148% above the U.S. average. At typical usage (2.9 hours/day), a electric water heater here costs $185 per month.
Per hour
$2.10
at 3,500–5,500 W
Per day
$6.08
2.9 hours/day
Per month
$185
397 kWh
Per year
$2,220
4,763 kWh
By usage level in Hawaii
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.45 hrs/day) | $3.04 | $92.44 | $1,110 |
| Typical (2.9 hrs/day) | $6.08 | $185 | $2,220 |
| Heavy (5.8 hrs/day) | $12.16 | $370 | $4,439 |
Hawaii vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a electric water heater in Hawaii?
At Hawaii's current average residential rate of 46.6¢/kWh (April 2026), a electric water heater with typical usage costs about $6.08 per day, $185 per month, or $2,220 per year.
Is running a electric water heater in Hawaii more expensive than average?
Yes. Hawaii's electricity costs about 148% more than the U.S. average, so the same usage costs $185 per month here versus $74.58 nationally.
What does electricity cost in Hawaii right now?
Hawaii residents pay an average of 46.6¢ per kWh as of April 2026 — the 51st cheapest rate of the 51 U.S. jurisdictions we track.