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How Much Does It Cost to Run a Desktop Computer in Arizona?
The short answer
In Arizona, a desktop computer drawing 150W costs about $0.02 per hour — roughly $5.61 a month if it runs 8 hours a day.
That’s based on Arizona’s average residential rate of 15.4¢/kWh (EIA, July 2026), 16% below the US average.
Source: U.S. EIA, July 2026 data · Updated
Desktop Computer cost by daily use in Arizona
| Daily use | kWh/month | Per day | Per month | Per year |
|---|---|---|---|---|
| 1 hour/day | 4.6 | $0.02 | $0.70 | $8.42 |
| 2 hours/day | 9.1 | $0.05 | $1.40 | $16.84 |
| 4 hours/day | 18.3 | $0.09 | $2.81 | $33.68 |
| 8 hours/day | 36.5 | $0.18 | $5.61 | $67.36 |
| 12 hours/day | 54.8 | $0.28 | $8.42 | $101 |
| 24 hours/day | 109.5 | $0.55 | $16.84 | $202 |
Arizona vs other states
At typical use, a desktop computer costs $67.36 a year in Arizona — $143 less than in Hawaii and $11.65 more than in Louisiana.
Arizona has the 19th-cheapest residential electricity of the 50 states and DC. Arizona electricity rates · all states ranked
Electricity price trend in Arizona
15.4¢/kWh in July 2026 — ▲ +0.3% from a year earlier.
How to lower the cost of running a desktop computer
Everyday desktop use — browsing, documents, video calls — is light work for a modern PC, so most office desktops plus a monitor draw around 100–200W. Workstations rendering video or running heavy software use more. Sleep mode drops consumption to just a few watts, so letting the computer sleep when you step away makes a real difference over a year.
- Set the computer to sleep after 15–30 minutes and the display after 5–10 minutes.
- Turn off the whole setup with a power strip at the end of the day.
- Lower monitor brightness — it often accounts for a big share of the total.
Questions
Frequently asked questions
How much does it cost to run a desktop computer for 24 hours in Arizona?
Running a 150W desktop computer for 24 hours uses about 3.60 kWh, which costs about $0.55 at Arizona’s average rate of 15.4¢/kWh.
How many kWh does a desktop computer use per month?
At 8 hours a day, a typical desktop computer uses about 36.5 kWh a month. In Arizona that costs $5.61.
Is it expensive to run a desktop computer in Arizona?
Arizona has the 19th-cheapest residential electricity of the 50 states and DC at 15.4¢/kWh — cheaper than most. Running a desktop computer here costs about $67.36 a year at typical use, compared with $80.20 at the national average rate.
What is the electricity rate in Arizona right now?
The average residential electricity rate in Arizona was 15.4¢ per kWh in July 2026, according to the latest EIA data — up 0.3% from a year earlier.
Desktop Computer costs in nearby states
Other appliances in Arizona
Cheapest and priciest states
Comparisons
Sources & method
- Electricity rates: U.S. Energy Information Administration, Electric Power Monthly — average residential retail price, July 2026 (latest available). Retrieved .
- CO₂: EIA State Electricity Profiles, 2024 emissions rate of in-state power generation.
- Default usage for desktop computer: 8 hours a day. Typical power 150W.
- Formulas, duty cycles and limitations: methodology. Data download: open data (CC BY 4.0).