Cost to Run a Desktop Computer 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 (6 hours/day), a desktop computer here costs $13.26 per month.
Per hour
7.1¢
at 100–400 W
Per day
$0.44
6 hours/day
Per month
$13.26
38 kWh
Per year
$159
451 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (3 hrs/day) | $0.22 | $6.63 | $79.63 |
| Typical (6 hrs/day) | $0.44 | $13.26 | $159 |
| Heavy (12 hrs/day) | $0.87 | $26.53 | $319 |
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 35.3¢/kWh (April 2026), a desktop computer with typical usage costs about $0.44 per day, $13.26 per month, or $159 per year.
Is running a desktop computer in California more expensive than average?
Yes. California's electricity costs about 88% more than the U.S. average, so the same usage costs $13.26 per month here versus $7.06 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.