Techie's Lounge VPN speed test tool

You can get massively different results depending on how you have set it up -

Code:
http://testmy.net/
is a good source of info and testing for VPN's as it takes consideration of the compression that takes place to data being sent/received via a device connected to a VPN.

This tests how much data can be downloaded at once, which is your MB/s, the other main factor is latency/ping (how long does it take your data to get from point a to point b).

Id recommend trying this even if you dont use a vpn -
Code:
https://code.google.com/archive/p/namebench/