Simple Optimal TCP Window Scalling Calculator
Given the fact that you know your Network Bandwidth in Megabits/second and the Round Trip Time that your connections have in seconds, the script tries to estimate at which Window Scaling factor your connection's bandwidth is theoretically fully consumed.
Remember, Window Scaling can be disabled by Proxy devices.
Relevant Resources:
https://packetlife.net/blog/2010/aug/4/tcp-windows-and-window-scaling/
https://www.qacafe.com/resources/tcp-window-scaling-examples/