This article explains how to check your Wi-Fi speed on Windows and Mac computers. It includes information on using an online speed test.
How to check internet speed on your PC (laptop/desktop)
There are a few different ways to check your Wi-Fi speed on a Windows computer, but they all essentially lead to the same place. This is the easiest way.
Right-click the Wi-Fi indicator in the Windows taskbar at the bottom of your screen and click Open Network & Internet settings.
Click Wi-Fi in the Status dialog box that appears.