WAN Latency Estimator - WintelGuy.com

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WAN Latency Estimator
Enter a number in either field, then click outside of the text box.

Distance in: 

		Miles (mi) 

		Kilometres (KM)

Distance between sites: 

Fibre path adjustment: 

   %
Metro fibre & local loop length: 

Speed of light in fibre: 

/ millisecond 
Equipment latency: 

     millisecond 
Round-trip time (RTT): 

millisecond 

Notes:

The primary purpose of this tool is to estimate WAN latency based on the light signal propagation time over a fibre link.
This tool does not take into account any additional delays that may be introduced by communication protocols, routing, encryptions, data transformation, etc.
See also:

Network throughput calculator...

How fast does light travel through a fibre optic cable?

What is Network Latency and Why Does It Matter? - by O3b Networks.