SpeedoLab

100% free · No sign-up · Works in your browser

Free Online Speedometer

Measure GPS speed or explore an interactive speedometer simulator.

Live GPS SpeedometerSpeedometer Simulator

Live GPS asks for location permission only after you press Start GPS — and it always clearly shows its tracking status.

Speedometer Tools

Purpose-built tools for measuring, simulating and understanding speed.

Speedometer Simulator

Available

A fully interactive dashboard with digital and analog gauges, a 0–300 speed slider, km/h and mph units, gauge ranges and themes. Clearly labeled as simulation — not real speed.

Open simulator

Live GPS Speedometer

Available

Measures your real speed from your device's GPS in km/h or mph, with accuracy shown. Calculated entirely in your browser — nothing is stored or transmitted.

Open GPS speedometer

Speed Converter

Available

Convert speed instantly between km/h, mph, m/s and knots with accurate results.

Convert speed

km/h to mph Converter

Available

Convert km/h to mph instantly with a calculator, conversion formula and common speed values.

Convert km/h to mph

Weight Converter

Available

Convert tonnes, quintals, kilograms, grams, pounds and stones with a free weight calculator.

Convert weight

Trip Time Calculator

Available

Calculate estimated travel time and arrival time using your journey distance, average speed and planned breaks.

Calculate trip time

How to use SpeedoLab

  1. 1

    Choose your tool

    Measure real speed with the Live GPS Speedometer, explore the interactive Speedometer Simulator, or select a converter for speed and weight units.

  2. 2

    Enter your values

    For speed conversion, enter a value and select the units you need. For weight conversion, choose units such as kilograms, grams, pounds or quintals.

  3. 3

    View your result

    Get conversion results instantly. In the simulator, adjust the speed slider, switch between km/h and mph, and explore digital or analog gauges.

Frequently asked questions

Is SpeedoLab really free?

Yes. Every tool on SpeedoLab is free to use, with no account, subscription or payment — from any country.

Does the simulator show my real speed?

No. The simulator is clearly labeled “Simulation — not actual vehicle speed”. It responds only to the controls you use, like the slider and animation.

Does the GPS speedometer store or share my location?

No. Your browser's location is used only to compute speed on your device. Your location is never stored or sent anywhere.

Which units and gauge ranges are supported?

You can display speeds in km/h or mph with correct conversion, and choose gauge ranges of 120, 180, 240 or 300.

Does it work on phones and tablets?

Yes. The layout is responsive and controls are sized for touch, so it works well on mobile, tablet and desktop.