Cost to Run a Aquarium in California
California's average residential electricity rate is 35.3¢/kWh as of April 2026 — the 50th cheapest in the country, 88% above the U.S. average. At typical usage (24 hours/day (always on)), a aquarium here costs $25.75 per month.
Per hour
3.5¢
at 50–300 W
Per day
$0.85
24 hours/day (always on)
Per month
$25.75
73 kWh
Per year
$309
876 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (12 hrs/day) | $0.42 | $12.88 | $155 |
| Typical (24 hrs/day) | $0.85 | $25.75 | $309 |
| Heavy (24 hrs/day) | $1.69 | $51.51 | $618 |
California vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a aquarium in California?
At California's current average residential rate of 35.3¢/kWh (April 2026), a aquarium with typical usage costs about $0.85 per day, $25.75 per month, or $309 per year.
Is running a aquarium in California more expensive than average?
Yes. California's electricity costs about 88% more than the U.S. average, so the same usage costs $25.75 per month here versus $13.72 nationally.
What does electricity cost in California right now?
California residents pay an average of 35.3¢ per kWh as of April 2026 — the 50th cheapest rate of the 51 U.S. jurisdictions we track.