Cost to run a wi-fi router / modem
Short answer
Running a wi-fi router / modem (~15W, ~24 hrs/day) costs about $0.06/day, $2/month, or $22/year at the U.S. average of 16.8¢/kWh.
Wattage
15 W
Per day
$0.06
Per month
$2
Per year
$22
Figures assume ~15W for ~24 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.
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Frequently asked questions
How much does it cost to run a wi-fi router / modem?
About $0.06 per day, $2 per month, or $22 per year at the U.S. average of 16.8¢/kWh, assuming ~15W for ~24 hours a day.
How many watts does a wi-fi router / modem use?
A typical wi-fi router / modem draws about 15 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 wi-fi router / modem?
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.