U.S. residential electricity EIA data: July 2026 US average 18.3¢/kWh Updated
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Home Office · Hawaii

How Much Does It Cost to Run a Desktop Computer in Hawaii?

The short answer

A typical 150W desktop computer costs about $0.07 per hour to run in Hawaii, or $17.52 a month at 8 hours a day.

That’s based on Hawaii’s average residential rate of 48.0¢/kWh (EIA, July 2026), 162% above the US average.

Source: U.S. EIA, July 2026 data · Updated

Desktop Computer cost by daily use in Hawaii

Cost at 48.0¢/kWh, the Hawaii average (EIA, Jul 2026)
Daily usekWh/monthPer dayPer monthPer year
1 hour/day 4.6 $0.07 $2.19 $26.28
2 hours/day 9.1 $0.14 $4.38 $52.56
4 hours/day 18.3 $0.29 $8.76 $105
8 hours/day 36.5 $0.58 $17.52 $210
12 hours/day 54.8 $0.86 $26.28 $315
24 hours/day 109.5 $1.73 $52.57 $631

Hawaii vs other states

Hawaii has the most expensive electricity in the country, so running a desktop computer here costs $155 more a year than in Louisiana at the same usage.

Hawaii has the most expensive residential electricity of the 50 states and DC. electricity prices in Hawaii · all states ranked

Electricity price trend in Hawaii

48.0¢/kWh in July 2026 — ▲ +22.0% 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 Hawaii?

Running a 150W desktop computer for 24 hours uses about 3.60 kWh, which costs about $1.73 at Hawaii’s average rate of 48.0¢/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 Hawaii that costs $17.52.

Is it expensive to run a desktop computer in Hawaii?

Hawaii has the most expensive residential electricity of the 50 states and DC at 48.0¢/kWh — one of the most expensive. Running a desktop computer here costs about $210 a year at typical use, compared with $80.20 at the national average rate.

What is the electricity rate in Hawaii right now?

The average residential electricity rate in Hawaii was 48.0¢ per kWh in July 2026, according to the latest EIA data — up 22.0% from a year earlier.

Desktop Computer costs in nearby states

Cheapest and priciest states

Comparisons

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