Cost to Run a Tankless Electric Water Heater in Oklahoma
Oklahoma's average residential electricity rate is 13.3¢/kWh as of April 2026 — the 4th cheapest in the country, 29% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $50.94 per month.
Per hour
$2.39
at 13,000–27,000 W
Per day
$1.68
0.7 hours/day
Per month
$50.94
383 kWh
Per year
$612
4,599 kWh
By usage level in Oklahoma
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.84 | $25.47 | $306 |
| Typical (0.7 hrs/day) | $1.68 | $50.94 | $612 |
| Heavy (1.4 hrs/day) | $3.35 | $102 | $1,223 |
Oklahoma vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Oklahoma?
At Oklahoma's current average residential rate of 13.3¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $1.68 per day, $50.94 per month, or $612 per year.
Is running a tankless electric water heater in Oklahoma more expensive than average?
No — it's cheaper. Oklahoma's rate is about 29% below the U.S. average: $50.94 per month here versus $72.01 nationally.
What does electricity cost in Oklahoma right now?
Oklahoma residents pay an average of 13.3¢ per kWh as of April 2026 — the 4th cheapest rate of the 51 U.S. jurisdictions we track.