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

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

The short answer

In Washington, a desktop computer drawing 150W costs about $0.02 per hour — roughly $5.37 a month if it runs 8 hours a day.

Washington’s average residential rate was 14.7¢ per kWh in July 2026 (EIA), 20% below the US average.

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

Desktop Computer cost by daily use in Washington

Cost at 14.7¢/kWh, the Washington average (EIA, Jul 2026)
Daily usekWh/monthPer dayPer monthPer year
1 hour/day 4.6 $0.02 $0.67 $8.05
2 hours/day 9.1 $0.04 $1.34 $16.11
4 hours/day 18.3 $0.09 $2.68 $32.21
8 hours/day 36.5 $0.18 $5.37 $64.43
12 hours/day 54.8 $0.26 $8.05 $96.64
24 hours/day 109.5 $0.53 $16.11 $193

Washington vs other states

At typical use, a desktop computer costs $64.43 a year in Washington — $146 less than in Hawaii and $8.72 more than in Louisiana.

Washington has the 13th-cheapest residential electricity of the 50 states and DC. electricity prices in Washington · all states ranked

Electricity price trend in Washington

14.7¢/kWh in July 2026 — ▲ +9.4% 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 Washington?

Running a 150W desktop computer for 24 hours uses about 3.60 kWh, which costs about $0.53 at Washington’s average rate of 14.7¢/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 Washington that costs $5.37.

Is it expensive to run a desktop computer in Washington?

Washington has the 13th-cheapest residential electricity of the 50 states and DC at 14.7¢/kWh — cheaper than most. Running a desktop computer here costs about $64.43 a year at typical use, compared with $80.20 at the national average rate.

What is the electricity rate in Washington right now?

The average residential electricity rate in Washington was 14.7¢ per kWh in July 2026, according to the latest EIA data — up 9.4% from a year earlier.

Desktop Computer costs in nearby states

Cheapest and priciest states

Comparisons

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