Ping to Server Distance
Estimate the physical distance to a game server from your measured ping using the speed of light in fiber optic cable.
Results
What is it?
Light travels at approximately 300,000 km/s in a vacuum but only about 200,000 km/s in fiber optic cable (roughly 0.67c, due to the glass refractive index). Your round-trip ping is the time for a signal to reach the server and return. Dividing by 2 gives one-way travel time, which estimates physical distance. Processing overhead (server tick rates, router latency) reduces the true propagation component.
How to use
Enter your ping in milliseconds (from an in-game display or ping command), the approximate number of network hops (from traceroute), and an estimated processing overhead. The calculator outputs the estimated straight-line server distance.
Example scenario
50 ms ping, 10 ms processing overhead = 40 ms network propagation. One-way = 20 ms. Distance = (20 x 0.001 x 200,000 x 0.67) / 2 = approximately 1,340 km. This is a rough estimate; actual cable paths are rarely straight.
Pro tip
Real network routing adds 20-50% more cable distance than the physical straight-line distance. ISPs route traffic through peering points that may be far from the geographic direct path. The lower bound of possible ping to a server X km away is (X / 100,000) x 1000 ms. Sub-10ms ping is only achievable within approximately 300 km of a server.