Units US (Gallons / oz) Metric (Liters / g)
Sugar Scale Gravity (1.xxx) Plato (°P)
Wort Gravity (OG)
Wort Volume (Gallons)
Target Pitch Rate 0.35 - Minimum mfg recommendation (ale) 0.50 - Healthy fresh yeast (ale) 0.75 - Pro brewer (ale) 1.00 - High gravity ale 1.50 - Minimum lager 2.00 - High gravity lager Million cells / mL / degree Plato
Yeast Type Liquid Yeast Dry Yeast Yeast Slurry
Yeast Amount (grams)
Cell Density (billion cells / gram) Common range: 6 to 20 billion cells per gram depending on strain
Manufacture Date
Number of Packs / Vials
Cells Per Pack (billion)
Slurry Volume (mL)
Slurry Density (billion cells / mL)
Calculate Reset Settings
Show step-by-step formulas
Viability Decay Rate (% per day) Default: 0.7% per day (approximately 21% per month)
DME Extract Potential (PPG) Default: 45 points per pound per gallon
If you need more yeast cells, use this section to plan up to three starter step-ups.
Starting Yeast Count (Billion Cells) Grab from above
Starter Size (L)
Starter Gravity
Growth Model and Aeration Braukaiser - Stir Plate White/Zainasheff - Stir Plate White/Zainasheff - Intermittent Shaking White/Zainasheff - No Aeration