How much does a desktop computer cost per month in District of Columbia?

About $8.66 a month, assuming 200 W, 8 hours a day, 250 days a year at 25.98¢/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?

District of Columbia has the 9th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $72.64 a year.

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Cost to run a desktop computer in District of Columbia (August 2026 rates)

At 25.98¢ per kilowatt-hour — District of Columbia's average residential price in August 2026 — running a desktop computer costs $104 a year. That is 43% more than the national average of $72.64. District of Columbia's residential rate is up 12.1% from August 2025, which moves this appliance from $92.72 to $104 a year.

Per hour: 5.2¢
Per day of use: 41.6¢
Per month: $8.66
Per year: $104

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 District of Columbia compares

District of Columbia pays 25.98¢/kWh, the 9th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $31.28 more a year than the typical U.S. household pays for the same use. Running the same desktop computer costs $50.88 a year in Nevada and $189 in Hawaii, so where you live changes this bill by $138 a year.

State	Rate	Per month	Per year
Connecticut	24.51¢	$8.17	$98.04
New Jersey	24.61¢	$8.20	$98.44
District of Columbia	25.98¢	$8.66	$104
New Hampshire	27.64¢	$9.21	$111
Rhode Island	28.18¢	$9.39	$113

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

What else costs about the same in District of Columbia

Refrigerator$104 a year in DC Air purifier$114 a year in DC Electric oven$86.46 a year in DC

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 District of Columbia?: About $8.66 a month, assuming 200 W, 8 hours a day, 250 days a year at 25.98¢/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?: District of Columbia has the 9th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $72.64 a year.