Yeast Calculator

Calculate how many yeast packages to add or how big of a starter to make

PurePitch

Formula for calculating viability for White Labs PurePitch® yeast packets is based on official data found on the whitelabs website (also listed below).

Average viability of PurePitch® pure liquid yeast over a period of six months:

Time	Viability
1 month	99.21%
2 month	98.05%
3 month	90.26%
4 months	84.28%
5 months	79.35%
6 months	71.59%