Networking & IT Tools
Ping Latency / Distance Calculator
Convert between physical distance and theoretical minimum network latency, based on the speed of light in fiber-optic cable.
55.7ms minimum round-trip
27.9ms one-way, at the speed of light in fiber
Assumes light travels through fiber at roughly 200,000 km/s (about two-thirds the speed of light in a vacuum), and a perfectly straight cable path with zero switching/processing delay — real-world pings are always higher due to cable routing and equipment along the way.
How to use this tool
- 1Choose distance-to-ping or ping-to-distance mode.
- 2Enter your known value.
- 3See the theoretical minimum/maximum for the other.
Frequently asked questions
Why is real-world ping always higher than this?+
Real fiber routes aren't perfectly straight, and every switch, router, and piece of equipment along the way adds processing delay on top of the pure speed-of-light travel time.