Rotation: Calculate Distance and Speed

Stopwatch and calculator for speed, rotational speed and distance covered of a rotating body. The radius is the body's distance from the center of rotation. The rotational speed is given in revolutions per minute, here you can convert rotation units. Please indicate the length as well as the time or stop the time. Add another value, the remaining three values are calculated.


Rotation Calculator

Time: s
Rotational speed: rpm

The distance covered is calculated as twice the radius times the number of revolutions times the number π.

Example: if a body with radius 1 makes one revolution in one second, then it has a speed of 22.62 km/h, makes 60 revolutions per minute and covers 6.28 meters in that second.

Physics commonly uses SI units. Here is a calculator to convert units.