Satellite Signal Delay Calculator

Estimate radio signal latency to a satellite based on altitude. Uses speed of light and a simplified straight-line “up + down” path (approximate).

Choose a preset or enter an altitude.
Altitude above Earth’s surface.
We approximate the path as straight up + straight down: distance ≈ 2 × altitude for a ground station directly below the satellite.
Real networks add routing & processing delays.
How we calculate

Speed of light c ≈ 299,792 km/s. One-way ≈ altitude / c. RTT ≈ 2 × altitude / c (using our straight up+down model).