Online Speedometer: Live GPS Speed Tracker

The page uses navigator.geolocation.watchPosition to receive updated location readings. When the device supplies the Geolocation API speed property, the value arrives in metres per second. The tool converts that reading to kilometres per hour or miles per hour without uploading it.

GPS speed is derived from changes in satellite measurements and position over time. A browser cannot force a device to provide speed. Some laptops, tablets, and phones return a position but leave the speed field empty, especially when the device is stationary or relies mainly on Wi-Fi positioning.

A live reading requires movement and a sequence of good fixes. Allow several seconds outdoors before judging the result. Locking the phone, switching apps, battery-saving settings, or background browser limits may pause updates.

One metre per second equals 3.6 km/h and about 2.237 mph. The unit buttons change only the display; both values come from the same device-reported speed. Walking pace is often around a few km/h, while cycling and vehicle speeds are higher, so the display keeps one decimal place for low readings.

Use the unit expected by the road signs, training plan, or activity you are comparing. The tool is a convenient secondary display. It is not a certified instrument and should not replace a vehicle's approved speedometer or safety equipment.

GPS speed can be accurate under open sky, but the browser does not provide a universal speed-accuracy value. The horizontal accuracy shown on the page describes the reported position radius, not a direct error bound for speed. A poor fix, reflected signals between tall buildings, tunnels, heavy tree cover, and indoor use can make the number jump.

At very low speeds, small position changes and sensor noise form a larger share of the measurement. A stationary device may briefly report movement. Wait for the fix to settle and compare a sustained reading rather than one instant. If accuracy remains poor, move to open sky and disable aggressive battery saving for the browser.

You can check the coordinates and their accuracy on My Location. Read how accurate a phone speedometer is before comparing it with another instrument. For direction independent of GPS movement, use the live compass on a compatible phone.

Mount the phone securely before starting. A driver must not hold, tap, or read this page while the vehicle is moving. Set the unit before departure and let a passenger operate it if interaction is needed. Follow local laws covering phone mounts and displays.

For cycling or running, keep the device where it has a view of the sky and cannot fall. Clothing, bags, and body position can reduce reception. GPS updates also use battery power, so long sessions may benefit from a dedicated fitness device designed for continuous tracking.

This page shows the current value and does not record a route, maximum speed, or trip history. Closing the tab ends the watch and clears the displayed data.