Cost to run a desktop computer
Short answer
Running a desktop computer (~200W, ~5 hrs/day) costs about $0.17/day, $5/month, or $61/year at the U.S. average of 16.8¢/kWh.
Wattage
200 W
Per day
$0.17
Per month
$5
Per year
$61
Figures assume ~200W for ~5 hours a day at the U.S. average 16.8¢/kWh. Your state's rate and your real usage change the total — enter both in the calculator.
Your rate & usage
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Frequently asked questions
How much does it cost to run a desktop computer?
About $0.17 per day, $5 per month, or $61 per year at the U.S. average of 16.8¢/kWh, assuming ~200W for ~5 hours a day.
How many watts does a desktop computer use?
A typical desktop computer draws about 200 watts when running. Your model may differ — check its label or a plug-in power meter and enter the real number in the calculator.
How can I cut the cost of running a desktop computer?
Run it less, use a more efficient model, and check whether your utility offers cheaper off-peak (time-of-use) rates. Costs also vary 4× by state, so your local rate matters a lot.