The above calculated results are average approximation, if you want to know exact power consumption of your wifi router then you can do that with the help of a Kill A Watt Meter.
Kill A Watt Meter is a simple device which gives real time data of power consumption of any device.
You can check it on amazon using this link – Kill A Watt Electricity Usage Monitor
To use a Kill A Watt meter to calculate the power consumption of your wifi, first connect your wifi to the Kill A Watt meter and then plug the Kill A Watt meter to your wall socket and you are good to go.
Then start using your wifi and you can see in real time how many kWh (units) of electricity your wifi router is consuming.
To get exact power consumption it is advised to take the reading for 3-7 days of operation.
Check out this tutorial video from altE to learn how to use a kill A Watt Meter to track your appliance energy consumption.
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