13 comparison tools
Speed & motion
Your pace against sprinters, cheetahs, trains, jets and the speed of sound.
- Braking distance Stopping distances at different speeds, drawn against things you can see out of the window.
- Cycling speed A cycling speed against commuters, club riders, the Tour de France and the human-powered record.
- Fraction of light speed Any speed as a percentage of c, with the fastest things humans and nature have managed.
- How fast is that? Any speed placed on one scale running from a garden snail to the speed of light.
- Reaction time A reaction time against sprinters, drivers, fighter pilots and the limits of nerve conduction.
- Running pace Your pace per kilometre against parkrun averages, club runners and world records.
- Speed in Mach A speed divided by the speed of sound, with the aircraft that fly at each multiple.
- Speed of sound in materials The speed of sound in air, water, wood, steel and diamond, on one scale.
- Speed vs animals Your top speed against the animals people most want to know they can escape.
- Swimming speed A swimming speed against Olympic swimmers, sharks, dolphins and a nuclear submarine.
- Throwing speed A ball speed against baseball pitches, cricket deliveries, tennis serves and record smashes.
- Vehicle top speeds A speed against bicycles, cars, trains, aircraft and rockets.
- Wind speed A wind speed on the Beaufort scale, from a calm day to a category 5 hurricane.