How much does a desktop computer cost per month in New Jersey?

About $8.32 a month, assuming 200 W, 8 hours a day, 250 days a year at 24.95¢/kWh.

How many kilowatt-hours does a desktop computer use?

Roughly 400 kWh a year under these assumptions, or 0.20 kWh for every hour it runs.

Is that expensive compared with other states?

New Jersey has the 9th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $73.36 a year.

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Cost to run a desktop computer in New Jersey (June 2026 rates)

At 24.95¢ per kilowatt-hour — New Jersey's average residential price in June 2026 — running a desktop computer costs $99.80 a year. That is 36% more than the national average of $73.36.

Per hour: 5.0¢
Per day of use: 39.9¢
Per month: $8.32
Per year: $99.80

Assumption: 200 W, 8 hours a day, 250 days a year — 400 kWh a year. An office-class tower plus monitor, doing ordinary work. Use the calculator to swap in the numbers from your own model.

How New Jersey compares

New Jersey pays 24.95¢/kWh, the 9th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $26.44 more a year than the typical U.S. household pays for the same use. Running the same desktop computer costs $52.44 a year in Nevada and $211 in Hawaii, so where you live changes this bill by $158 a year.

State	Rate	Per month	Per year
District of Columbia	24.39¢	$8.13	$97.56
Vermont	24.44¢	$8.15	$97.76
New Jersey	24.95¢	$8.32	$99.80
New Hampshire	27.01¢	$9.00	$108
Alaska	28.21¢	$9.40	$113

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

What else costs about the same in New Jersey

Refrigerator$99.80 a year in NJ Air purifier$109 a year in NJ Electric oven$83.03 a year in NJ

Cutting the number down

Sleep after 15 minutes idle is the default with the largest payoff and the smallest downside.
Screensavers do not save energy; a display running a 3D animation costs more than a blank screen.

Questions

How much does a desktop computer cost per month in New Jersey?: About $8.32 a month, assuming 200 W, 8 hours a day, 250 days a year at 24.95¢/kWh.
How many kilowatt-hours does a desktop computer use?: Roughly 400 kWh a year under these assumptions, or 0.20 kWh for every hour it runs.
Is that expensive compared with other states?: New Jersey has the 9th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $73.36 a year.