Network Latency Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the distance in km.
- Press Calculate.
How it works
The theoretical minimum latency is the distance divided by the speed of light in fibre (~200,000 km/s). Real latency is higher due to routing and equipment.
Worked example
1,000 km. ≈ 5 ms one-way, 10 ms round-trip (minimum).
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.