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Speedometer in MPH — Check Your Speed in Miles per Hour

GPS Connected Acquiring GPS… Location blocked GPS unavailable Tracking paused Accuracy: —
00:00:00Trip Duration
0.0 kmDistance
0 KM/H Current Speed Speed
Waiting for your location…
Live Tracking0.0 km
Max Speed0km/h
Avg Speed0km/h
Distance0m
Altitude—m
Heading—
Accuracy—m
Quick Answer: This online speedometer shows your speed in miles per hour (mph). Tap Start, allow location access, and your phone’s GPS reports your real ground speed in mph about once a second — in a car, on a bike, on a train or on foot. No app, no sign-up, and nothing leaves your device.

Built for drivers and riders in the US and UK: a large mph readout, top speed, average speed and trip distance in miles. Switch to km/h or knots with one tap whenever you need to.

Speedometer in miles per hour

How to Check Your Speed in MPH Right Now

Direct Answer: To see your current speed in mph, 1) open this page on your phone, 2) tap Start and choose Allow when the browser asks for your location, and 3) keep the phone where it can see the sky. The gauge shows your live speed in mph within a few seconds of getting a GPS fix.
  1. 1. Open the mph speedometer

    It works in Safari, Chrome, Firefox and Edge on iPhone and Android. The unit is already set to MPH on this page.

  2. 2. Allow precise location

    Choose Allow While Using (iPhone) or Allow (Android) and keep Precise Location switched on. Without precise location the speed jumps around or stays at zero.

  3. 3. Mount the phone and go

    In a car, use a dashboard or windshield mount. On a bike, use a handlebar mount. Readings settle after 10–15 seconds of open sky.

Everyday speeds in mph — With the same speed in km/h
With the same speed in km/h

What Is MPH and Where Is It Used?

Direct Answer: MPH (miles per hour) is the number of statute miles travelled in one hour. One mile is exactly 1,609.344 meters, so 1 mph = 1.609344 km/h and 1 km/h ≈ 0.621 mph. Road speed limits are posted in mph in the United States and the United Kingdom, and in a few other countries and territories.

Everywhere else, road signs and car dashboards use kilometers per hour. That is why this site lets you switch units: drive in the US in mph, then switch to km/h on a trip to Canada or Europe, or to knots on a boat.

Speed in mphSame speed in km/hTypical example
3 mph4.8 km/hWalking pace
15 mph24.1 km/hSteady city cycling
25 mph40.2 km/hCommon US residential limit
30 mph48.3 km/hDefault UK built-up area limit
55 mph88.5 km/hCommon US two-lane highway limit
70 mph112.7 km/hUK motorway and many US interstates

Need an exact figure? Use the speed converter for any mph, km/h, knots or m/s value.

How Your Phone Measures Speed in MPH

Direct Answer: Your phone’s GPS chip measures speed from the Doppler shift of satellite signals, which gives velocity directly in meters per second. This page converts that value to mph by multiplying by 2.23694. In open sky the result is typically accurate to within about 0.2–1 mph.

The receiver tracks satellites from GPS, Galileo, GLONASS and BeiDou. As you move, each satellite’s signal arrives at a slightly shifted frequency, and from those shifts the chip works out how fast and in which direction you are travelling. Because it measures movement over the ground, a GPS speedometer does not depend on tire size, wheel wear or gearing — the things that make a car’s dashboard reading drift.

Learn more in how a GPS speedometer works, or compare it with your dashboard using the speedometer test.

Why Your Car Shows a Higher MPH Than This Speedometer

Direct Answer: Most car speedometers read a little high on purpose. Rules in the UK and Europe forbid a speedometer from ever showing less than your true speed, so manufacturers set them to over-read — often by 1–3 mph at highway speeds. GPS shows your true speed, so it is usually slightly lower than the dashboard.

Bigger or smaller tires than the factory size, worn tread and low tire pressure change the reading further. If the gap is larger than about 5%, compare at a steady speed on a straight, open road and check your tire size.

Speed Stuck at 0 MPH? Quick Fixes

  • iPhone (Safari): Settings → Privacy & Security → Location Services → Safari Websites → While Using the App, with Precise Location on.
  • Android (Chrome): tap the icon left of the address bar → Permissions → Location → Allow, and turn on Google Location Accuracy in system settings.
  • Indoors or underground: GPS needs a view of the sky. Wait for a fix near a window or outdoors; tunnels and subways block the signal.
  • Still shows km/h? Tap the MPH button under the gauge. Your choice is remembered on this device.

Frequently Asked Questions About the MPH Speedometer

How fast am I going in mph right now?

Tap Start at the top of this page and allow location access. Your current speed appears in mph on the gauge within a few seconds, along with your top speed and average speed for the trip.

Is this mph speedometer accurate?

Under open sky, phone GPS speed is usually within about 0.2–1 mph of your true speed at a steady pace. Accuracy drops in tunnels, under dense trees and between tall buildings.

How do I convert mph to km/h?

Multiply mph by 1.609344. For example, 60 mph × 1.609 ≈ 96.6 km/h. Or tap KM/H under the gauge to see the live reading in kilometers per hour.

Does it work offline?

Yes, once the page has loaded. GPS speed comes from satellites, not mobile data. For instant access without a signal, install it as an app on your home screen.

Can I use it on a bike or while running?

Yes. It measures any movement. See the bike speedometer and running speed pages for tips on mounting and accuracy.

Is my location stored?

No. Speed is calculated in your browser and nothing is sent to or saved on our servers.

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