Cost to Run a Desktop Computer in California
California's average residential electricity rate is 33.6¢/kWh as of July 2026 — the 50th cheapest in the country, 84% above the U.S. average. At typical usage (6 hours/day), a desktop computer here costs $12.62 per month.
Per hour
6.7¢
at 100–400 W
Per day
$0.42
6 hours/day
Per month
$12.62
38 kWh
Per year
$152
451 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (3 hrs/day) | $0.21 | $6.31 | $75.79 |
| Typical (6 hrs/day) | $0.42 | $12.62 | $152 |
| Heavy (12 hrs/day) | $0.83 | $25.25 | $303 |
California vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a desktop computer in California?
At California's current average residential rate of 33.6¢/kWh (July 2026), a desktop computer with typical usage costs about $0.42 per day, $12.62 per month, or $152 per year.
Is running a desktop computer in California more expensive than average?
Yes. California's electricity costs about 84% more than the U.S. average, so the same usage costs $12.62 per month here versus $6.88 nationally.
What does electricity cost in California right now?
California residents pay an average of 33.6¢ per kWh as of July 2026 — the 50th cheapest rate of the 51 U.S. jurisdictions we track.