Show your speed
Press Show my speed and allow location when your browser asks. Under an open sky the first fix takes a few seconds; the lamp above the dial turns green and the needle follows your speed.
GPS SpeedometerFree GPS Speedometer
A speedometer in your browser that reads your phone's GPS: your speed on a real dial with a speed limit warning, big digits and a windscreen view, trips with the route drawn by speed, splits and laps, and a 0 to 100 timer. Your position is used on your device only.
Speedometer
GPS off
Screen stays on
This trip
Not startedDistance0
Time0
Average0
Top speed0
Climb0
Height0
Acceleration0
Over limit0
Trip A0.0
Trip B0.0
Total0
Speed
Laps
| Lap | Time | Distance | Average | Top |
|---|
Press Lap during a trip to time a stretch of road. Laps can also start by themselves every kilometre (Settings, Trips and GPS).
Trips
Every trip you record stays in this browser on this device. Open one to see its route drawn by speed, its splits, height and laps.
No trips yet
On the Drive screen, press Start trip before you set off, then Finish when you arrive. You can also open a GPX file from a watch, bike computer or another app.
Tools
Time a launch or a quarter mile, check your car's speedometer, keep an average speed zone under the limit, watch the g-force and find exactly where you are.
Performance timer
Only on a closed road or a track, never in traffic.
From and to
to
km/h
Press Get ready, then stop completely.
0.00s
0 km/h
Your results
| Test | Time | Distance | Speed | When |
|---|
No runs yet. Results stay on this device.
Speedometer check
Many car speedometers read a little high on purpose. Hold a steady speed and ask a passenger to type what the car shows.
GPS now--
| GPS | Car shows | Difference |
|---|
Average speed check
For roads with average speed cameras. Press Start at the first camera to see your average and, if you know the zone length, the speed that keeps your average under the limit for the rest of the zone. The limit itself always applies.
Average so far--
Distance--
Keep under--
G-meter
Speeding up moves the dot up, braking down, bends left and right. Worked out from GPS, or from the phone's motion sensor when the phone is held still in a mount.
Speeding up or braking0.00 g
In bends0.00 g
Strongest0.00 g
Where am I
Your position to read out on a phone call, for example to a breakdown service. A Plus Code is a short code for this spot that map apps such as Google Maps can find, with no street address needed.
- Plus Code
- --
- Latitude, longitude
- --
- Degrees, minutes, seconds
- --
- Height and accuracy
- --
Copy and Share only send your position where you choose. This tool itself never sends it anywhere.
Settings
Changes are saved at once in this browser. The light or dark look follows the site's theme button.
Vehicle and units
What are you in?
Speed
Height
Second needle at top speedA thin needle stays at the fastest speed of the trip, like a racing gauge.
Speed limit warning
Warn me above the limit
Limit
km/h
Warn when over by
Sound
VibrateAndroid phones only.
Say "Slow down"
Spoken updates
Say the distance, time and averageEvery kilometre or mile during a trip.
Say each lap time
Say timer results
Only voices stored on this device are offered, so nothing you hear is sent online.
Trips and GPS
Start a trip when I move offAfter you show your speed, a trip starts by itself once you are moving.
New lap every
Ignore readings less accurate thanVague readings are kept out of the distance and top speed.
Steady the dialSmooths small jumps between readings. Off shows every reading as it comes.
Screen
Keep the screen onMost phones stop giving websites the location when the screen goes off, so keep it on during trips.
Windscreen and big digits colour
Your data
Trips, settings and meters are kept only in this browser.
Total distance
Delete every trip and resultSettings stay. Back up first if you may want them again.
Your location is read only after you press Show my speed or another button that needs your speed, worked out on this device and never sent anywhere. Keep your eyes on the road. Keys on the Drive screen: Space starts or pauses a trip, L marks a lap, B big digits, W windscreen.
How to Use the GPS Speedometer
Pick what you are in
Tap the vehicle in the dial's top right corner: car, motorbike, bicycle, on foot, boat, train or plane. It sets how far the dial goes and how slowly you can move before you count as stopped.
Set your speed limit
Tap the round sign at the top left and pick the limit of your road. Above it the dial turns red and a chime, beeps, a vibration or a spoken "Slow down" reminds you.
Record a trip
Press Start trip before you set off, Pause at a stop and Finish when you arrive. The trip computer counts distance, time, average and top speed, climb, time over the limit and laps.
Look back at trips
Open a trip under Trips to see its route coloured by speed, the speed and height charts, splits and laps, play it back on the dial or save it as GPX, KML, CSV or GeoJSON.
Use the tools
On a closed road or a track, time 0 to 100 or a quarter mile. Check your car's speedometer, keep an average speed zone under the limit, watch the g-meter or read out your position.
Why Use This GPS Speedometer?
🎯 A real instrument
A dial with a second needle that stays at the trip's top speed, an odometer that rolls like a car's, a heading strip and a speed chart, sized to fit a phone in a holder upright or on its side.
🌙 Windscreen view
At night, lay the phone flat under the windscreen and read the mirrored digits in the glass, in green, white, amber or blue. Big digits shows the same without the mirror for a phone holder.
📊 Trips you can study
Every trip keeps its route coloured by speed, splits for each kilometre or mile, the time spent at each speed, height and laps, drawn from your own points with no map fetched underneath.
⏱️ Performance timer
0 to 100, 60 to 100, eighth and quarter mile, one kilometre and braking, with crossing times worked out between readings and an optional one-foot rollout. Results stay on your device.
📁 Your own files
Open GPX files from a watch or bike computer, back up every trip to one file and move it to another phone, and save any trip as GPX, KML, CSV or GeoJSON for other apps.
🔒 Stays on your device
Your position is read only after you press Show my speed, worked out in this browser and never uploaded. Trips stay in this browser until you delete them, and the Camera view saves straight to your device.
GPS Speed, Speedometers and Height Explained
🛰️ Where the speed comes from
A phone's GPS receiver reports a speed with each position, usually once a second. When a device reports none, as many laptops do, the tool works the speed out from the change of position over a few seconds, which reacts later. Readings the phone itself marks as vague are kept out of the distance and the top speed.
🚗 Why the dashboard shows more
Car speedometers may read high but never low: the international rule for them, UN Regulation No. 39, says the speed shown must never be less than the true speed and may be up to 10 percent plus 4 km/h more. That is why the GPS figure is often a little lower than the dashboard.
⛰️ Height from GPS
Browsers give the GPS height above a mathematical model of the Earth's shape, the WGS84 ellipsoid, not above sea level, so it can differ from the height on a map or a road sign. GPS height also wobbles more than position, so a climb is counted only once it clearly rises above the wobble.
Frequently Asked Questions
Is the GPS Speedometer free, and is my location uploaded?
It is free, with no registration. Like every page on ZeroDataUpload, it is supported by advertising. Your position is read only after you press Show my speed or another button that needs your speed, worked out in your browser and never sent to a server. Trips, timer results and settings stay in this browser; Delete, under Settings, removes the trips and results.
Why does this page ask for my location?
A speedometer needs your position, second by second. This is the one page of zerodataupload.com that may ask for it; the rest of the site, and anything embedded in this page such as the ads, cannot. Your browser asks you first. If you say no, the demo drive, GPX files, saved trips and the motion-sensor g-meter still work.
How accurate is the speed?
Under an open sky a phone's GPS usually follows your speed closely, a second or so behind. Tall buildings, tunnels, car parks and a phone deep in a bag weaken the signal: the lamp above the dial turns amber, and vague readings are kept out of the distance and the top speed. Laptops usually find their position from Wi-Fi networks and often cannot measure speed at all; the demo drive shows how the tool behaves with real readings.
Why does my car's speedometer show more than the GPS?
Car speedometers may read high but never low. The international rule for them, UN Regulation No. 39, says the speed shown must never be less than the true speed and may be up to 10 percent plus 4 km/h more. That is why the dashboard often shows a little more than the GPS. The Speedometer check, under Tools, measures your own car's difference with a passenger reading the dashboard.
Can I use it while driving?
Set it up before you drive and keep your eyes on the road; let a passenger handle the screen. Use a proper phone holder and follow your country's rules on phones in vehicles. Use the performance timer only on a closed road or a track, never in traffic. The speed limit warning is a reminder you set yourself, not a list of real limits: the road signs always apply.
Does it keep working with the screen off?
Most phones stop giving websites the location when the screen goes off or the browser moves to the background, so keep this page open with the screen on during a trip; the tool can keep the screen on for you (Settings, Screen). A running trip is kept every few seconds, so if the browser closes you can carry on or save it the next time you open the page.
Where are my trips, photos and videos kept?
Trips are kept in this browser's own storage on this device until you delete them. Browsers can clear a site's data when a device runs low on space, so use Back up all trips, under Trips, to keep a copy or move them to another phone. Photos and videos from the Camera view are saved straight to your device as files and never uploaded.