Pitch Rate & Growth Calculator

Wyeast's Pitch Rate and Growth Calculator is a tool for planning a propagation scheme to achieve proper cell counts in the fermenter. This calculator will calculate for 1 or 2 step propagations. For more information on propagations, visit the Propagation section on this site.

First determine your desired pitch rate (x million cells per mL) based on the anticipated wort and fermentation conditions (for help see the Pitch Rate section of this site). Next fill in the fields on the calculator and press the "Calculate" button. The pitch rate (total cells/total volume) will be displayed to the right of the calculator. Adjust the fields to achieve your desired pitch rate.

1 Step Propagation

Determine your final pitch rate for a 1 step propagation.

2 Step Propagation

Determine your final pitch rate for a 2 step propagation.

2 Step Propagation - Additional Information

Optional: Complete this additional question if you are implementing 2-step process