If you're anything like me, chances are that you have a lot of gadgets in your home or office. But how much power are these gadgets using -- and wasting? How much are your gadgets and devices ...

PRO power meter, as I can use this to measure how much power a device is drawing. Power is priced in kilowatt hours (KW h, or 1,000W), which is 3.6 million joules of energy.

Measuring consumption using a meter like this is easy: plug in the meter to your mains point, plug in your device to the meter, and push the button to cycle through the readings.

You might think a shut down PC would use no electricity, but depending on your setup, it could still be drawing power. There are ways to prevent this, though.

Check Power consumption of your PC using these free PC Power Consumption and Supply Calculator software & hardware for Windows 11/10.

And speaking of receiving things in the mail, I was also recently sent a device for measuring power consumption – the Watts Up energy meter manufactured by Electronic Educational Devices.

A directional coupler is used to sample a small amount of input signal power for measurement purposes. Port 1 is the input port; port 2 is the output port; port 3 is the coupled port; port 4 is the ...

Whole-home energy monitors can measure how much electricity your home uses, down to the individual circuits and even single devices, letting you identify ways to save.

Estimate how much juice your PC is using with a quick calculator, or measure it with a cheap power.