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A calculator for the duration for a certain distance from time and length of another distance. Please enter a covered distance and the time this took. Enter, for which distance the time should be extrapolated, here one kilometer is preset. The time for the new distance and the speed in kilometers per hour (km/h), meters per second (m/s), or miles per hour (mph), will be calculated. The speed is the same for both distances. In practice, it is of course hard to keep a speed, so this extrapolation is only an approximation.

Example: when you make 10 kilometers in half an hour, you need 18 seconds for 100 meters. So the speed is 5.56 meters per second or 20 kilometers per hour.

The average speed will tend to be lower over a longer distance than over a short distance. For running and other forms of locomotion that rely on muscle power, it is obvious why this is the case. A sprint cannot be maintained for long; the longer the distance, the more energy reserves must be conserved in order to last to the end. But even when using vehicles, factors come into play over a long distance that are often not present over a short distance. Breaks must be taken and the vehicle must be charged or refueled. Finally, the probability of something unexpected happening is simply greater over long distances. As the distance and duration increase, the spread of the individual speeds often increases, i.e. the number and magnitude of the speed changes.

The time for the given number of kilometers is the inverse of the speed; the higher this value, the lower the speed. See also pace.

Calculator for Walking, Running, Swimming, Cycling, Driving.

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