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

About 99.4¢ a month, assuming 30 W, 8 hours a day, 250 days a year at 19.89¢/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?

Illinois has the 16th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $11.00 a year.

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Cost to run a computer monitor in Illinois (June 2026 rates)

At 19.89¢ per kilowatt-hour — Illinois's average residential price in June 2026 — running a computer monitor costs $11.93 a year. That is 8% more than the national average of $11.00. Illinois's residential rate is up 8.7% from June 2025, which moves this appliance from $10.97 to $11.93 a year.

Per hour: 0.6¢
Per day of use: 4.8¢
Per month: 99.4¢
Per year: $11.93

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 Illinois compares

Illinois pays 19.89¢/kWh, the 16th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to 93.0¢ more a year than the typical U.S. household pays for the same use. Running the same computer monitor costs $7.87 a year in Nevada and $31.63 in Hawaii, so where you live changes this bill by $23.77 a year.

State	Rate	Per month	Per year
Delaware	19.29¢	96.5¢	$11.57
Wisconsin	19.56¢	97.8¢	$11.74
Illinois	19.89¢	99.4¢	$11.93
Pennsylvania	21.73¢	$1.09	$13.04
Maryland	21.84¢	$1.09	$13.10

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

What else costs about the same in Illinois

3d printer$12.89 a year in IL Security camera$8.71 a year in IL Electric pressure cooker$8.35 a year in IL

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 Illinois?: About 99.4¢ a month, assuming 30 W, 8 hours a day, 250 days a year at 19.89¢/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?: Illinois has the 16th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $11.00 a year.