Yeast Pitch Rate Calculator

Dry yeast is dosed by weight, not by cell counting. Manufacturers standardise their product at roughly 10 billion viable cells per gram, which is why Lallemand states that applying liquid-yeast cell calculators to dry yeast significantly overpitches. This calculator uses the manufacturer weight rates directly:

Baseline rates follow published manufacturer guidance: Fermentis recommends 50 to 80 g/hL for ale strains and 80 to 120 g/hL for lager strains. Wine and mead strains such as EC-1118 are dosed around 25 g/hL per the packet instructions, and dedicated distilling strains typically sit near 50 g/hL. The calculator lists common named strains from both makers and uses the middle of each published band at normal gravities: 65 g/hL for Fermentis ale strains, 75 for Lallemand ale and kveik strains, 100 for lagers, 25 for Lalvin wine and mead strains, and 50 for the DistilaMax distilling line.

Above 1.060 OG the rate scales linearly, reaching 1.5 times the baseline at 1.120 and beyond. This follows the manufacturer advice to use the top of the range for stronger worts, and the published finding that pitching rate directly affects fermentation speed and flavour compound formation in high gravity fermentations.

Rehydrating before pitching gives the highest viability: sprinkle the yeast into about 10 times its weight of clean water, at 30 to 35°C for wine and distilling strains or 25 to 29°C for beer strains, rest 15 minutes, stir gently, then pitch within 30 minutes. The calculator shows the water amount for your dose.

Many modern strains are sold as direct-pitch tolerant, and sprinkling onto the wash works. But rehydration costs nothing, removes a variable, and matters most exactly where pitching matters most: high gravity washes and cool fermentations.

Turbo yeasts are the exception to weight-based dosing. They are packaged as one fixed sachet per batch size stated on the label, with nutrients included, so the calculator reports packet count rather than grams for those.

An underpitched wash starts slowly, leaving the sugar exposed to competing microbes, and the stressed yeast that eventually grow produce more fusel alcohols along the way. In a wash headed for the still, those fusels concentrate into the tails and drag the cut window narrower. A stalled high gravity ferment is the worst case: sugar left unfermented and a wash that reads sweet on the hydrometer no matter how long you wait.

Moderate overpitching is comparatively benign. Fermentation runs faster and slightly cleaner, at the cost of a little less ester character, which for a neutral sugar wash is no cost at all. When in doubt between one packet and two on a strong wash, pitch two. Pair the pitch with proper nutrition from the Yeast Nutrient Calculator, and check your expected strength with the Sugar Wash Calculator before you commit the sugar.