Converter Web ToolsConverter WebTools

GPS Speed Test

Create a GPS Speed Test in your browser, free and instantly.

km/h mph m/s knots
AnalogDigital
0 km/h
0
km/h
0
Top speed
0
Average
—
GPS accuracy
Your GPS data is processed only on your device and is never uploaded or stored. For accurate readings, allow location access and use it outdoors on a phone.

Speedometer for every vehicle

Same GPS engine, tuned for what you're moving in — with the right units and dial range for each.

For Car For Bike For Motorcycle For Bus For Train For Boat For Plane For Truck For Scooter For Running For Walking GPS Speedometer GPS Odometer

About the GPS speed test

This GPS speed test measures how fast you are really moving using your device's GPS, and shows it on a dial and a digital readout in km/h, mph, m/s or knots, with your top and average speed. It is a quick way to check your true ground speed or test how accurate another speedometer is. Everything runs on your device; nothing is uploaded.

How GPS Speed Test works

What it tests

It reads your position from GPS and works out speed from how far you move over time. Because GPS measures actual distance over the ground, it is a good reference for checking a car, bike or app speedometer — which often read a little high. The accuracy figure (in metres) tells you how strong your GPS fix is; the smaller the number, the more reliable the speed reading.

How to run the test

  1. Press Start and allow location access.
  2. Use it outdoors with a clear view of the sky.
  3. Move steadily and compare the GPS speed with the gauge you are testing.

See also the GPS speedometer and the speed converter.

Common uses

  • Test your true ground speed
  • Check a car speedometer accuracy
  • Verify a cycling or running app
  • Measure speed in any unit
  • See top and average speed
  • Test GPS speed accuracy
  • Compare two speedometers
  • Quick on-the-go speed check

Frequently asked questions

What does a GPS speed test measure?
Your true ground speed, calculated from how far your GPS position moves over time.
Is GPS speed accurate?
With a good outdoor fix it is usually within a few km/h, and often more accurate than a car gauge.
How do I check my speedometer with it?
Run both at the same time at a steady speed and compare the readings.
Why does it need a clear sky?
GPS needs satellite visibility; indoors or among tall buildings the reading is less reliable.
Is my location uploaded?
No — everything stays on your device.
Is it free?
Yes, completely free with no sign-up.