How much does a computer monitor cost per month in Washington?

About 73.6¢ a month, assuming 30 W, 8 hours a day, 250 days a year at 14.71¢/kWh.

How many kilowatt-hours does a computer monitor use?

Roughly 60 kWh a year under these assumptions, or 0.03 kWh for every hour it runs.

Is that expensive compared with other states?

Washington has the 13th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $10.99 a year.

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Cost to run a computer monitor in Washington (July 2026 rates)

At 14.71¢ per kilowatt-hour — Washington's average residential price in July 2026 — running a computer monitor costs $8.83 a year. That is 20% less than the national average of $10.99. Washington's residential rate is up 9.4% from July 2025, which moves this appliance from $8.07 to $8.83 a year.

Per hour: 0.4¢
Per day of use: 3.5¢
Per month: 73.6¢
Per year: $8.83

Assumption: 30 W, 8 hours a day, 250 days a year — 60 kWh a year. A 27-inch IPS panel at moderate brightness. Larger, brighter or HDR panels run two to three times this. Use the calculator to swap in the numbers from your own model.

How Washington compares

Washington pays 14.71¢/kWh, the 13th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $2.16 less a year than the typical U.S. household pays for the same use. Running the same computer monitor costs $7.63 a year in Louisiana and $28.80 in Hawaii, so where you live changes this bill by $21.17 a year.

State	Rate	Per month	Per year
Wyoming	14.36¢	71.8¢	$8.62
Mississippi	14.54¢	72.7¢	$8.72
Washington	14.71¢	73.6¢	$8.83
Montana	14.99¢	74.9¢	$8.99
Florida	15.03¢	75.1¢	$9.02

States ranked by average residential price, cheapest first. See all 51 states for a computer monitor.

What else costs about the same in Washington

3d printer$9.53 a year in WA Security camera$6.44 a year in WA Electric pressure cooker$6.18 a year in WA

Cutting the number down

Brightness is the dominant variable. Dropping from 100% to 60% is a real cut in draw and usually more comfortable.

Questions

How much does a computer monitor cost per month in Washington?: About 73.6¢ a month, assuming 30 W, 8 hours a day, 250 days a year at 14.71¢/kWh.
How many kilowatt-hours does a computer monitor use?: Roughly 60 kWh a year under these assumptions, or 0.03 kWh for every hour it runs.
Is that expensive compared with other states?: Washington has the 13th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $10.99 a year.