Online GPS Speedometer — Check Your Speed Live

"How fast am I going right now?"

Somewhere on most journeys the thought surfaces: what is my speed, actually? You're in the passenger seat wondering whether the driver's "about seventy" is really seventy-eight. You're on a train watching fields blur past and want a number to go with the feeling. The dial at the top of this page answers while the moment is still happening — allow location, keep moving, and your live speed over the ground appears. No install, no account; the reading is the whole product. Prefer digits to a needle? The digital speedometer shows the same measurement as a large numeric display.

That immediacy is the point of using an online speedometer instead of installing one: the answer is a URL away, on whatever you happen to be aboard. GPS measures you, not the vehicle, so the same dial that referees a car ride will clock a bus, a bike, a ferry or the 8:15 express. Tap the buttons beneath the gauge to think in mph, km/h or knots — your choice sticks — and glance at the session's top speed afterwards to see what the fastest moment was. If you went looking for a speedometer online and landed here: this is it, already running.

Moments this page was made for

Riding shotgun. The driver swears they're doing the limit; the passengers aren't convinced. Prop the phone where everyone can see it and let the satellites referee — it also settles the road-trip chorus of "how fast are we going?" from the back seat before it starts.

On the train or bus. No dashboard to peek at, just scenery sliding past. Open the page and put a figure on the feeling — a commuter train hovers around 120 km/h, while a high-speed service can brush 300, and watching the dial chase it is oddly satisfying.

Testing a tired speedometer. Classic car, worn cable, or a gauge you've quietly stopped trusting? Hold a steady indicated speed and compare it with the GPS figure — a free sanity check before you spend money on the cluster. Our speedometer calibration guide explains why the two numbers rarely match exactly.

On the water with no instruments. Kayaks, dinghies, paddleboards and small sailboats rarely carry a log. Set the dial to knots and now you have one — handy for judging current, or for discovering the wind is giving you three knots for free.

How much to trust the reading

More than most gauges — with two honest caveats. GPS computes speed from how your position changes, which at travelling pace makes it very accurate, and often nearer the truth than a car's own cluster, since manufacturers deliberately tune those to show a touch more than reality. Caveat one: it needs sky. Under a concrete roof or between tall buildings the fix weakens and the needle can wander. Caveat two: at very low speed the figure lags and jitters, because small position noise drowns out a slow stroll. Moving steadily in the open, the number is the real one.

One practical note: all of this works because phones carry GPS chips, and most laptops and desktops don't. Open the page on a computer and it will say so honestly rather than invent a figure — the right instrument for this job is the phone already in your pocket.

When one check becomes a habit

If you open this page once a month, you never need anything more. If checking your speed is becoming part of every drive, the free Speedometer app for iPhone is the mounted version of the same idea: a bigger always-on readout, a HUD mode that mirrors the number onto the windshield after dark, Picture-in-Picture so the speed rides on top of your navigation app, and a log of each trip's distance, average and top speed. Its core tracking runs offline as well — and like this page, what it shows is GPS truth rather than the optimistic factory reading.

Grab the free Speedometer app on the App Store — the core speed display costs nothing, and there's no account to create.