What is Speedometer GPS?

Speedometer GPS shows your real-time speed using your device's GPS sensor. It works for walking, cycling, driving, sailing, or flying, with km/h, mph, m/s, and knots units. Everything is processed privately on your device.

The tool reads your speed straight from the device's geolocation feed. A semicircular dial sweeps from 0 to the unit's default top end (200 km/h, 120 mph, 60 m/s, or 110 knots) and auto-scales higher if you exceed it. A live trend sparkline plots the last sixty samples so you can see whether you're accelerating. The stats panel tracks current, maximum, and average speed, distance covered, trip time, and GPS accuracy, and it adds altitude above sea level and compass heading whenever the device reports them.

How to use

1. Step 1 — Click 'Start' and allow location access when prompted by your device.
2. Step 2 — Begin moving. Your current speed updates in real time on the display.
3. Step 3 — Pick the unit you need (km/h, mph, m/s, or knots). Watch the live trend chart, then read the full stats panel with max, average, distance, trip time, and altitude or heading when GPS provides them.

When to use

• Cycling without a bike computer when you want a live speed read-out.
• Backing up a car speedometer that you suspect is off after a tyre change.
• Capturing top speed on a downhill run or boat trip for fun stats.

Result

You're cycling and want to track your speed without installing a fitness app. Open the speedometer, start tracking, and watch your speed update live as you ride — plus see your top speed at the end.

FAQ

Why does the speed sometimes show 0 even though I'm moving?

GPS speed comes from comparing position fixes over time. Indoors, in tunnels, or under heavy tree cover the fix gets shaky and the browser may report null or zero. Stepping outside and waiting 10 to 20 seconds usually fixes it.

How accurate is GPS speed compared with my car's speedometer?

On open road with good signal GPS is usually within 1 to 2 km/h of true speed. Car speedometers are deliberately calibrated to read slightly high (often by 3 to 5 percent) so GPS will normally read a bit lower than the dashboard.

Can I use this offline or in airplane mode?

GPS itself works offline because the chip listens to satellites, but the browser has to be allowed to access location and the page needs to be loaded first. Once the tool is open it keeps updating without a data connection.

Why is the GPS accuracy number so important?

The accuracy in metres tells you the radius the device is confident about. Below 10 m is great, 10 to 30 m is okay, above 30 m means the speed reading could be noisy. The colour badge flips between green, amber, and red to match.

Does the tool record my route or speed history?

No track or location is stored. The page keeps a list of recent speed samples to compute your average for the current session, but everything is in memory. Reload the page or hit reset and it all disappears.

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