Online Speedometer - Check Your Live Car Speed in km/h

How to Use the Online Speedometer on This Page

1. Set the Location Services button to ON.
2. Allow the browser to access your location when prompted. Wait for the first GPS fix. This usually takes a few seconds.
3. Keep this page open and the screen on while tracking. Locking the screen or switching to another browser tab makes the browser delay or skip location updates, which produces incorrect speed and distance readings.

What This Speedometer Shows

• Three speed units at once: current speed in km/h, mph and m/s, displayed simultaneously.
• Live GPS reading: speed over ground from your device’s GPS, updated about once per second.
• Timer: total elapsed time since Location Services was switched on. Keeps counting while you are stopped.
• Max Speed Reached: the highest speed recorded during the session, updated whenever a new reading exceeds the previous one. Measured in kilometers per hour (km/h).
• Distance Traveled: the total horizontal ground distance covered since activation. Measured in meters (m).
• Share button: sends your current speed in km/h, mph, and m/s, along with max speed reached, distance traveled, country, and city as a text summary.
• 48 languages: the page is available in Arabic, Bengali, Chinese, French, German, Hindi, Japanese, Marathi, Portuguese, Russian, Spanish, Tamil, Telugu, Turkish and 34 more.
• Browser-based: Works in any modern browser on a device with a GPS receiver, such as a phone or a cellular tablet.
• Single on/off control: By switching Location Services on or off, tracking starts and stops.

Speed vs. Time Graph

Plots your speed in km/h from the moment Location Services was turned on. The horizontal axis shows five time labels taken from your device’s clock, spaced according to how long the session has run: after five seconds they are one second apart; after 10 minutes the same five labels cover those 10 minutes. The graph is fixed to km/h and cannot be switched to mph or m/s.

Country and City

Shows the country and city for your current coordinates. The place name is looked up once on our own server, so an internet connection is required for these two fields; speed, timer, distance and the graph work without one. City shows "No Data" when the lookup finds no matching place for your position, which happens in rural areas, at sea and where there is no local data. Country usually still resolves.

Accuracy and Signal

How frequently does the speed update?

About once per second on most phones. During hard acceleration or braking the reading trails your real speed by one to two seconds.

What does Max Speed Reached show?

The highest reading of the session, updated whenever a new reading exceeds the previous one. Readings taken with a weak or reflected signal can spike briefly, so an unusually high value may not be real.

Does the distance counter include elevation changes?

No. Distance is calculated by multiplying each speed reading by the time since the previous one, dx = v·dt, and adding the results together. The speed your browser reports is defined as the horizontal component of your velocity, so vertical movement is not included and the total is horizontal ground track. The difference is small in any case: on a 10% gradient the real slope distance is only about 0.5% longer than the horizontal distance.

What happens in tunnels or where the signal is weak?

The satellite signal is lost and the display stops updating. Readings resume within a few seconds of regaining a clear view of the sky.

Does weather affect it?

Very little. Cold drains the battery faster and heat can throttle the phone. Tree cover, or snow and water on the device, affect reception more than temperature.

Why does the reading differ from my car dashboard?

In countries following UNECE Regulation 39, including the EU, UK, Japan, South Korea and Australia, a car speedometer must never show less than the true speed, and at type approval it may over-read by up to 10% plus 4 km/h. Dashboards therefore tend to read 2% to 10% high. The United States, Canada and India have no equivalent national rule tied to that regulation. This page shows GPS speed over ground, usually within about 1 km/h with a clear view of the sky.

Can I calibrate the speedometer?

No. It measures GPS ground speed, independent of tire size, gear ratios and vehicle type.

Does it work on trains, buses, boats and planes?

It measures the speed over ground of whatever is carrying the device. On trains and buses, a window seat improves reception; metal bodies, coated glass and tunnels weaken it.

Devices, Browsers and Background Use

Does it work on a desktop or laptop?

Not usually. Most computers have no GPS chip, and an external USB receiver only reaches the browser if the operating system exposes it as a location sensor. Without GPS, the browser estimates your position from nearby Wi-Fi networks and your IP address. That position stays still or jumps in steps, so the speed reads 0 or jumps erratically. Use a phone or tablet outdoors.

Does it work in airplane mode?

Yes, on most phones. Airplane mode switches off cellular, Wi-Fi and Bluetooth but not the GPS receiver, which only listens to satellites. Load the page before enabling airplane mode, since the page itself needs an internet connection to load. Country and City stop updating; speed, timer, distance and graph continue.

Can I lock my screen or switch apps while it runs?

No. Browsers suspend JavaScript and pause location updates when a page is no longer visible, so tracking stops when you lock the screen, switch apps or switch tabs. On iPhone, Safari is the strictest: once the screen locks or Safari moves to the background, script execution is suspended almost immediately and continuous tracking stops. On Android, Chrome is somewhat more flexible and may keep going for a short while, particularly if the tab is still active, but once the browser is fully in the background or battery-saving restrictions apply, it stops there too.

How long can it run?

There is no built-in time limit, but the page must stay open and the screen must stay on. For a long trip, keep the screen awake and the device charging, and check that the page is still counting before you rely on a reading.

Privacy and Data

Is my location stored?

No. Speed, timer, maximum speed and distance are calculated in your browser and never leave your device. Your coordinates are sent once to our own server, only to look up the place name shown in the Country and City fields. They are not passed to any third-party service and nothing is stored. Turning off Location Services ends the tracking and the lookup.

Can I export the data?

No. You can screenshot the stats and graph, or use the share button for a text summary.

Can I use this for official or commercial speed records?

No. It is for personal reference and is not certified for commercial or legal use. Professional drivers should use approved tachographs or ELD systems.