All speed tools
39 free GPS speed tools, grouped by trip. Start with the main online speedometer if you are not sure which one you need.
Car tools
Live GPS speedometers for car, motorbike and bicycle, plus trip fuel cost, wheel offset and HUD tools.
Bike SpeedometerFree online bike speedometer: live GPS speed, max and average for bicycles, motorcycles and scooters in mph or km/h, plus a wheel size chart for bike computers.Open tool 
Car SpeedometerFree online car speedometer: your phone's GPS shows true speed in km/h or mph. Check a broken or inaccurate dash, use HUD mode, learn how car speedometers work.Open tool 
Fuel Cost CalculatorFree fuel cost calculator: trip gas cost from distance, mpg or L/100 km and fuel price, with round trip, cost per mile and cost split per person.Open tool 
GPS vs Car SpeedometerSpeedometer accuracy explained: why car speedometers read high, the legal limits, how tires change it, and a free GPS speedometer to test your car in mph.Open tool 
HUD SpeedometerFree HUD app in your browser: lay your phone under the windshield and see your GPS speed reflected in mph or km/h. Setup, night tips, legality. No download.Open tool 
Wheel Offset CalculatorFree wheel offset calculator: compare two wheels by width and ET offset, get backspacing and see how far the new wheel pokes out or tucks in, in mm and inches.Open tool Trains, flights & boats
Check how fast your train, plane or boat is going from your seat.
Boat SpeedometerFree GPS boat speedometer: live speed over ground in knots or mph, top speed and trip distance. Plus SOG vs STW, hull speed and no-wake zone rules.Open tool 
Bullet Train SpeedBullet train speed in mph and km/h: Shinkansen 177–199 mph, maglev 375 mph record, India's 320 km/h MAHSR. Measure your train live with GPS.Open tool Fastest Trains in the WorldThe fastest train in the world in 2026, in mph and km/h: China's CR400 (217 mph), the 375 mph maglev record, Acela and Brightline, plus a GPS train speedometer.Open tool 
How Fast Do Planes Fly?How fast does a plane fly? Jets cruise near 560 mph at 35,000 ft. Cruise, takeoff and landing speeds by aircraft, plus a free GPS speedometer for your flight.Open tool How Fast Do Trains GoHow fast do trains go? Amtrak Acela tops 160 mph, most long-distance trains 79 mph, freight 40–60 mph. See FRA limits and check your train live by GPS.Open tool Running, walking & cycling
Speed, pace and distance for runs, walks and rides.
Average Cycling SpeedAverage cycling speed is about 10–16 mph. See measured US trail speeds, road vs e-bike classes, Tour de France averages and a live GPS bike speedometer.Open tool 
Average Walking SpeedAverage walking speed is about 3 mph (4.8 km/h). See walking speed by age and sex from a 23,111-person meta-analysis, then measure your own pace live.Open tool 
How Fast Can a Human Run?How fast can a human run? Usain Bolt peaked at 27.8 mph (44.72 km/h). World record speeds by distance, average runner speeds and a free running speedometer.Open tool 
How Fast Do Animals Run?How fast does a cheetah run? 64 mph timed, 58 mph wild. Plus horse, greyhound, pronghorn, ostrich and bear speeds from studies, and a free GPS speedometer.Open tool 
Pace CalculatorFree running pace calculator: get pace per mile and per km, speed in mph, finish times and even splits for a 5K, 10K, half marathon or marathon.Open tool Running SpeedometerFree running speedometer for your phone: live GPS speed in mph or km/h, pace per mile or km, top speed and distance. No app, plus a speed-to-pace table.Open tool Odometer, HUD & converters
Trip odometer, heads-up display mode and speed unit converters.
100 km/h to mph100 km/h is 62.14 mph (100 ÷ 1.609344). See where 100 km/h is the speed limit, what 0–100 km/h means, and a 80–120 km/h to mph chart.Open tool 100 mph to km/h100 mph is 160.93 km/h (100 × 1.609344). It is above every US speed limit (max 85 mph). See US rail track-class speeds and an 80–120 mph chart.Open tool 120 km/h to mph120 km/h is 74.56 mph (120 ÷ 1.609344). Where 120 km/h is the limit (India's expressways, UK motorway equivalent), US comparison and a 100–140 chart.Open tool 20 mph to km/h20 mph is 32.19 km/h (20 × 1.609344). It is the default limit on Wales's restricted roads since 2023 and a fast bike pace. Chart 5–40 mph in km/h.Open tool 30 mph to km/h30 mph is 48.28 km/h (30 × 1.609344). The UK built-up limit, plus Highway Code stopping distances at 20–70 mph in metres and km/h, and a 10–50 mph chart.Open tool 60 mph to km/h60 mph is 96.56 km/h (60 × 1.609344). It is the UK national speed limit on single carriageways and the 0–60 benchmark. Chart 40–80 mph in km/h.Open tool 
Altitude: What Is My Elevation?What is my elevation? Free GPS altimeter: see your altitude in feet or meters, its vertical accuracy, and your lowest, highest and total climb.Open tool km to miles ConverterConvert km to miles instantly: divide by 1.609344. 5 km = 3.11 miles, 10 km = 6.21 miles, marathon = 26.22 miles. Free converter, race table and tricks.Open tool km/h to mph ConverterConvert km/h to mph instantly: divide by 1.609344. 100 km/h = 62.1 mph. Free converter, full 5–300 km/h table, mental-math tricks and road-sign guide.Open tool Knots to mph ConverterConvert knots to mph instantly: 1 knot = 1.15078 mph. Free knots to mph calculator, quick chart, formula, and US boating, aviation and hurricane examples.Open tool miles to km ConverterConvert miles to km instantly: multiply by 1.609344. 1 mile = 1.61 km, 10 miles = 16.09 km, 100 miles = 160.93 km. Free converter, chart and mental tricks.Open tool mph to km/h ConverterConvert mph to km/h instantly: multiply by 1.609344. 60 mph = 96.6 km/h, 65 mph = 104.6 km/h. Free converter, quick table and Canada driving guide.Open tool mph to Knots ConverterConvert mph to knots instantly: knots = mph × 0.868976. Free converter, quick chart from 1 to 500 mph, mental shortcut and US boating and aviation examples.Open tool mph to m/s ConverterConvert mph to m/s instantly: 1 mph = 0.44704 m/s exactly. Free calculator, full chart, mental shortcut, wind (Beaufort) and sprint examples.Open tool 
Online CompassFree compass online: open it on your phone to see your heading in degrees and a 16-point direction, with magnetic and true north. No app, no download.Open tool Speed ConverterFree speed converter for mph, km/h, knots, m/s, ft/s and Mach. Exact factors, a full conversion chart, unit history and worked US examples.Open tool 
Speed Distance Time CalculatorFree speed calculator: solve speed, distance or time from the other two, in mph, km/h, knots or m/s, plus true average speed for multi-leg trips.Open tool 
Speed of Sound (Mach to mph) ConverterThe speed of sound is 761 mph (1,225 km/h) at sea level and 660 mph above 36,000 ft. Free Mach to mph converter, altitude table and formula.Open tool 
Speedometer Calibration CalculatorCheck your speedometer calibration against GPS or a timed mile. Get the percent error, a correction factor and a corrected speed table in mph.Open tool 
Tire Size CalculatorFree tire size calculator: compare two tire sizes for diameter, sidewall, width and revs per mile, see plus sizes and your true speed at 60 mph.Open tool 
Trip OdometerFree online distance tracker: a GPS trip odometer that counts miles or km and moving time, copies the total for your mileage log and saves GPX. No app.Open tool Looking for reference speeds rather than a tool? See how fast people, trains, planes and boats go.
FAQ
Frequently asked questions
Are these speedometers free?
Yes. Every tool on this site is free, runs in your browser and needs no app or account.
Do the tools send my location anywhere?
No. Speed and distance are calculated on your device and nothing is stored or sent to our servers.
Which tool should I use?
Start with the main online speedometer. The other pages are the same GPS engine with a gauge range, units and tips tuned for one activity.