There are quite a few calculations needed to accurately determine a belt’s speed. These calculations do need to be made in detail to determine products and capabilities, however.
Multiply the RPM by the circumference of the roller - this provides the number for the linear distance traversed by a pound on the conveyor belt in one minute. Then calculate the distance traveled for one hour.
Revolutions per minute - or RPM -  is an internationally accepted expression of rotational velocity. It refers to the number of revolutions a rotating object makes on its own axis in one minute. Determining RPM is relevant for virtually every rotating entity known to man.