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

About $9.00 a month, assuming 200 W, 8 hours a day, 250 days a year at 27.01¢/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 Hampshire has the 8th 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 Hampshire (June 2026 rates)

At 27.01¢ per kilowatt-hour — New Hampshire's average residential price in June 2026 — running a desktop computer costs $108 a year. That is 47% more than the national average of $73.36. New Hampshire's residential rate is up 14.9% from June 2025, which moves this appliance from $94.04 to $108 a year.

Per hour: 5.4¢
Per day of use: 43.2¢
Per month: $9.00
Per year: $108

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 Hampshire compares

New Hampshire pays 27.01¢/kWh, the 8th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $34.68 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
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
Rhode Island	29.23¢	$9.74	$117

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

What else costs about the same in New Hampshire

Refrigerator$108 a year in NH Air purifier$118 a year in NH Electric oven$89.89 a year in NH

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 Hampshire?: About $9.00 a month, assuming 200 W, 8 hours a day, 250 days a year at 27.01¢/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 Hampshire has the 8th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $73.36 a year.