This website is well known in the internet for checking connection bandwidth. What you need is visiting the website http://www.speedtest.net and click on GO!
The results will be ready in couple of seconds.
This service is adv free. The RTR-NetTest informs users about the current service quality (including upload, download, ping, signal strength) of their Internet connection. In addition, a map view and statistics of previous tests can be accessed.
What you need just click on "Start RTR-NetTest" and accept Terms and Conditions.
The detailed results will be ready quickly: