Read boat speed in knots using your device's location. The boat speedometer reports speed over ground when the browser provides a usable reading.
LOCATION / GPSReady to start
km/h
—mph
YOUR CURRENT SPEED
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Press Start to check location access
Your trip at a glance
On this device
Top speed
—km/h
Average speed
—km/h
GPS distance
—
Elapsed time
—
Speed over timeNo readings yet
Allow precise location when your browser asks. Location readings stay in this tab unless you choose to save a route on this device.
Tap Start and allow precise location. Keep this page visible for speed updates.
Estimates from your device location. Distance can miss movement during signal gaps. Set up before moving and let a passenger handle the screen.
Trip controls and details
History is off by default. Up to 20 summaries are kept for 30 days. Recorded routes need a separate save confirmation.
Your chosen limit is a personal reminder. It does not identify the legal road speed limit.
Moving time
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Moving average
—
Pace
—
Heading
—
Altitude
—
Signal gaps
—
Mirror display reverses the instrument for a reflection. Visibility depends on your screen and surroundings.
Accepted readings and splits
Time
Speed
Source
Split
Distance
Duration
Continuity
Read boat speed in knots
Boat mode starts with knots and nautical-mile distance. You can change units without changing the underlying measurement. One nautical mile is 1,852 meters.
This tool can be used by passengers on a boat, ship or ferry when their device provides valid data. Reception and browser support vary; on-water field testing of Xpeed has not been completed.
Understand speed over ground
A location-based measurement describes movement relative to the ground. It does not measure movement through the water or provide depth, current, heading guidance or collision information.
Use proper marine instruments and local navigation guidance. The phone display is an additional reference.
Questions and answers
When does the browser ask for location?
Press Start to request location. If you have already allowed this site, measurement can begin without another prompt. A blocked permission must be changed in your browser or device settings.
What does a dash mean?
A dash means Xpeed has no usable recent reading. A measured zero is a valid speed. Returning to the page or moving to a place with better reception may help the device provide a new reading.
