Compare: Length | Velocity


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Velocity Comparison

Compare velocities in different units and with the top speed of animals and the speed of sound, Earth and light. Meters per second (m/s) is the official SI unit, kilometers per hour (km/h) is commonly used, whereas miles per hour (mph) is common in Anglo-America. The top speed of human and animals has been measured, higher values are possible in the future. Escape velocity and Earth orbit velocity hopefully don't change perceptibly. Speed of sound (in air) and speed of light (in vacuum) are constant.
Please enter one value, the other values will be calculated.

km/h:
mph:
m/s:

Elephant:
Human:
Horse:
Cheetah:
Barracuda:
Peregrine falcon at stoop:

Speed of sound:
Escape velocity on Earth:
Earth orbit velocity:
Speed of light:

Round to     decimal places


Examples:
• the highest speed reached by a running human is 45 km/h or 29 mph or 12,5 m/s.
• 1000 km/h is about 9 times faster as a cheetah can run.
• a peregrine falcon can speed up to more than 31 percent of the speed of sound, a human only 3.6 percent.


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