Use this calculator to solve for a third value when you only have two, i.e. you know your CPR and frequency but need your RPM.
Just enter the values you do have, click Calculate, and you'll have the information you need to order your EPC encoder. When specifying an encoder for your application, take RPM and frequency limitations into consideration.
Enter values into any two fields to solve for the third.
NOTE: Leave the blank value blank. Do not enter 0 or any spaces.