There are many online tools available to test the speed of your net connection. I like speedtest.net
Afterwards their mobile apps on iOS, Android and window phone speedtest.net has now sprung a Google chrome app.
This will let you to test the speed of your connection whenever Web looks to be slow down or you can test it at the time you launch your web browser.
It is a special mini version that does a pretty good role. If you want you can compare speed of broadband from nearby location. If you need to switch from one plan to another, it’s better to cross check the speed from broadband from adjacent your location before changing the plan.