Satellite Internet Latency Estimator

Satellite internet can reach places fiber never will, but it always comes with one trade-off: latency. When you click a link, your request has to travel to space and back before anything loads. No technology can beat that round trip, because the signal cannot move faster than light. That is why satellite ping is fundamentally different from the ping you get on cable or fiber, where the signal only travels a few hundred kilometres through ground cables.

Why satellite internet always has higher latency

With a normal broadband connection, your data travels through underground fiber to a nearby exchange — often less than a few hundred kilometres away, so the round trip takes only a handful of milliseconds. With satellite internet, your dish must send the request up to the satellite, which relays it down to a ground station connected to the wider internet, and the reply makes the same journey in reverse. That is four trips across the satellite's altitude. For a geostationary satellite parked 35,786 km above the equator, that means roughly 143,000 km of travel — about half a second at the speed of light, before any network processing is even counted.

How this estimator calculates ping

The calculator uses the simplest physics there is: distance divided by the speed of light. It takes the orbit altitude you select, multiplies by four (up to the satellite, down to the ground station, and the return journey), and divides by 299,792 km/s. It then adds a realistic allowance for network overhead — modem processing, routing, and queueing — set at 25 ms for low-Earth-orbit services and 30 ms for medium and geostationary services. Finally it compares the result with the fiber or cable ping you enter, so you can see the gap in plain numbers.

Worked example: LEO vs GEO

Take a Starlink-style low-Earth-orbit satellite at 550 km. Four trips across 550 km is 2,200 km. Divide by 299,792 km/s and you get 0.00734 seconds — just 7.3 ms of pure signal travel. Add 25 ms of overhead and the total is about 32 ms, close to the 20–50 ms real users report, and only about three times slower than a typical 10 ms fiber ping. Now take a geostationary satellite at 35,786 km: four trips is 143,144 km, which takes 477 ms at light speed. Add 30 ms of overhead and you get roughly 507 ms — over half a second. That single number explains why video calls feel awkward on GEO connections while they work fine on LEO.

Practical tips for living with satellite latency

If you are on satellite internet, choose a low-Earth-orbit service whenever you can — the latency difference versus GEO is dramatic, while the monthly price is often similar. Keep your dish firmware updated, because operators regularly shave milliseconds off the network side. For video calls, turn off HD video when the connection struggles; the lower bitrate reduces jitter even if it cannot reduce ping. And for gaming, stick to turn-based or strategy games on high-latency links, and save competitive shooters for a low-latency connection.