The 2nd Pulley Diameter equation calculates the diameter of a second pulley based on the RPMs and Diameter of the first pulley and the RPMs of the second pulley. Belt length around two pulleys.

INSTRUCTIONS: Choose units and enter the following:

(RPM_{d}) The RPMs of pulley 1.

(D_{d}) The diameter of pulley 1.

(RPM_{D}) The RPMs of pulley 2.

2nd Pulley Diameter (D_{D}): The calculator computes the diameter of pulley 2 (D_{D}) in meters. However this can be automatically converted to other length units via the pull-down menu.