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Network Latency Calculator
EstimatorEstimate minimum theoretical latency based on geographic distance and transmission medium.
About This Tool
Light travels at 186,282 miles/second in vacuum. Through fiber, it travels at about 67% of that speed. A New York–London fiber cable (~3,500 miles) has a theoretical minimum RTT of ~56 ms; real-world is typically 70–80 ms due to routing. Geostationary satellites orbit at 22,236 miles altitude.