FILENAMES: Pulley_Diameters_and_Speed_Formulas.xls DESCRIPTION: This is an Excel spreadsheet for calculating pulley diameters versus speeds. Posted by Marty Escarcega . The following description was provided: ================================================================= This little Excel Spread Sheet will help you calculate Pulley Diameters for a given speed. All you have to do is enter the variables. Credit to be given to Carl Young who wanted to share it with the metalworking hobbyist community.