Online Speedometer — Check Your Current Speed Live

An online speedometer is a browser tool that shows your current speed using your phone or laptop’s built-in GPS — the same sensor maps use. You open this page, tap Start, and the speedometer online reads satellite data directly, then displays your live speed on a digital readout and analog gauge.

Unlike a car dashboard that estimates speed from wheel rotation, a GPS speedometer measures how fast you are actually moving over the ground. That makes it useful well beyond the driver’s seat — as a speed tracker for trips, a check against your vehicle’s dial, or simply to answer “what is my current speed right now?” without installing anything.

This page keeps the tool front and center. The guide below supports it — short, practical, and linked to deeper pages only where you need more detail.

Tip: Keep your screen on and the browser in the foreground for the smoothest updates. Background tabs may pause GPS to save battery.

Two complementary methods are combined:

• Doppler shift (primary): As you move toward or away from a satellite, its radio carrier frequency appears slightly higher or lower. Comparing this shift across several satellites gives an instantaneous velocity vector, typically every second.
• Position change over time (fallback): When Doppler data is briefly unavailable, speed can be derived from the distance between consecutive position fixes divided by time. This is less smooth during rapid acceleration but works well at steady pace.

Modern phones combine GPS with Galileo, GLONASS, and BeiDou satellites, which helps the fix stay stable even if one constellation is partly blocked. The result is a practical, real-world GPS speedometer that reflects how fast you are moving over ground, not how fast your wheels are turning.

Want the deeper technical version — including when Doppler is preferred over position delta and how accuracy is reported? Read the dedicated GPS speedometer guide.

• Kilometers per hour (km/h) — Standard for road signs and car dials across Europe, Asia, and most other regions. Good default if you are unsure.
• Miles per hour (mph) — Used in the United States, United Kingdom, and a few other markets. Useful when comparing against a US/UK dashboard or speed limit sign.
• Meters per second (m/s) — Handy for running pace, short sprints, and scientific contexts. Feels more granular at low speeds.
• Knots (kn) — One nautical mile per hour. Standard in marine and aviation contexts — see boat speedometer and flight speed.

Quick conversions (exact, not rounded for limits): 1 mph = 1.60934 km/h  ·  1 m/s = 3.6 km/h  ·  1 knot = 1.852 km/h. For precise tables and a live calculator, open the speed converter.

GPS accuracy is not a single number. These factors matter most:

• Sky view: Open highways and parks give the cleanest signal. Deep urban canyons, dense tree cover, and tunnels can weaken or block satellites, causing the fix to wobble or pause until you emerge.
• Steady vs. sudden movement: At a steady walk, cycle, or cruise, readings are smoothest. During very abrupt braking or sharp turns, GPS may lag briefly by a second or so compared to a wheel sensor.
• Device and settings: Newer phones that use multiple constellations (GPS + Galileo + GLONASS + BeiDou) and have High Accuracy location enabled tend to hold a steadier fix.
• Low speeds: At near-zero speed, small position jitter can make the readout flicker between 0 and a low value. Standing still for a moment usually settles it.

For a controlled comparison, you can test your speedometer accuracy against GPS on a straight, open road.

Also useful for boats (knots), flights (ground speed near a window), and as a lightweight trip speed tracker that logs max, average, and distance while you move.

Safety note: If you are driving, mount the phone securely and avoid interacting with the screen while the vehicle is moving. Glance briefly, just as you would a dashboard.

• Chrome (Android/Desktop): Tap the lock icon in the address bar → Site settings → Location → Allow → reload and tap Start.
• Safari (iPhone/iPad): Settings → Privacy & Security → Location Services → Safari Websites → Allow While Using App. Then reload this page.
• Still at 0? Move outdoors, keep the browser in the foreground, and ensure High Accuracy / Precise Location is enabled on your device. Indoors or in tunnels, GPS may pause until satellites are visible again.
• Speed jumps while standing still? Small GPS jitter at rest is normal. Stand still a few seconds; the readout should settle to 0.

Detailed permission guides and diagnostics are on How Fast Am I Going — including what to do if you previously tapped “Block.”

If you notice your car dial consistently reads higher than GPS, that is expected — learn why and how to check it properly on the car speed test page and the broader speedometer test guide.