Propagation & Starter Calculator

By Tamara Logsdon
07.30.2025
Technical Center

Measurable consistency is the foundation of successful, reproducible fermentations. Whether brewing professionally or starting your next weekend brew day, use Wyeast’s propagation and starter calculator to dial in your cells per mL.

Find Your Pitch Rate

Professional Home Enthusiast

Propagation

Yeast slurry density (cells/mL)

Volume of slurry (L)

Initial Total Cell Count

Volume of Starter

BBL

Hectoliters

Final Total Cell Count

1st Top Up

Volume of Wort

BBL

Hectoliters

Final Pitch Rate 1st Top Up

2nd Top Up

Final Total Cell Count 2nd

Volume of Wort 2nd

BBL

Hectoliters

Final Pitch Rate 2nd Top Up

Starter Cell Count Calculation

Activator Cell Count Density (cells/mL)

Volume of Starter (Liters)

Final Total Cell Count