Normally when your WiFi network is connected to an Access Point, you can tell how strong or weak the connection is by looking at the signal bar in the taskbar to see how many solid bars are there, like this:
But how strong or week the connection is exactly?
Run the following command line in a Command Prompt or PowerShell window to find out. Check out the Signal line if you don’t know where to look.
netsh wlan show interface
If you are a PowerShell guy, run the following instead:
(netsh wlan show interfaces) -Match '^\s+Signal' -Replace '^\s+Signal\s+:\s+',''
Or, download and run this Wireless networks scanner PowerShell script on your computer that has a WiFi adapter.
Alternatively, NirSoft has a free portable tool that you can use as well.
WirelessConnectionInfo from NirSoft is a simple network tool that displays general information and statistics about your active wifi connection. One of the info listed is Signal Quality that measures the quality of signal with a number between 0 and 100. As you can see from the screenshot below, my 4 out of 5 wifi signal quality scored at 71 out of 100.