Enter the total sprockets and the total number of teeth into the Calculator. The calculator will evaluate the Cassette Ratio. 

Cassette Ratio Formula

CR = S/T


  • CR is the Cassette Ratio (sprockets/teeth)
  • S is the total sprockets
  • T is the total number of teeth

To calculate the Cassette Ratio, divide the total sprockets by the total number of teeth.

How to Calculate Cassette Ratio?

The following steps outline how to calculate the Cassette Ratio.

  1. First, determine the total sprockets. 
  2. Next, determine the total number of teeth. 
  3. Next, gather the formula from above = CR = S/T.
  4. Finally, calculate the Cassette Ratio.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total sprockets = 20

total number of teeth = 15