Yeast Pitching Rate Calculator
Estimate how many grams and packets of Lallemand dry yeast you should pitch based on volume, gravity, and fermentation style.
How this Lallemand pitching rate calculator works
This tool estimates yeast demand using the classic brewing formula based on wort volume, wort strength, and style-specific pitch rate. It then converts the result into grams of dry yeast and number of packets. You also get a comparison against practical Lallemand-style dosing ranges in g/hL.
Core formula
Cells needed (billions) = Volume (L) × Plato (°P) × Pitch Rate (million cells/mL/°P)
From there:
- Grams needed = Cells needed ÷ Cells per gram
- Packets needed = Grams needed ÷ Packet size
Typical pitch targets and dry yeast dose ranges
| Fermentation Type | Default Pitch Rate | Typical Dose Range |
|---|---|---|
| Ale | 0.75 million cells/mL/°P | 50-100 g/hL |
| Hybrid | 1.00 million cells/mL/°P | 75-150 g/hL |
| Lager | 1.50 million cells/mL/°P | 100-200 g/hL |
| High Gravity | 1.20 million cells/mL/°P | 150-300 g/hL |
Why pitching rate matters
Underpitching can stress yeast and increase unwanted esters, fusels, and stalled fermentations. Overpitching can reduce character in some styles and limit healthy growth phases. A balanced pitch helps you get:
- Reliable attenuation and cleaner fermentation
- Predictable flavor profile
- Improved consistency from batch to batch
- Faster starts and reduced contamination risk
Practical usage tips
1) Rehydrate when possible
Dry yeast often performs best when rehydrated according to manufacturer instructions. Proper rehydration can improve viability and shorten lag time.
2) Match pitch to wort strength
As OG rises, cell demand climbs quickly. Big beers almost always need additional yeast versus a standard-strength ale.
3) Consider fermentation temperature and oxygen
Cooler fermentations (especially lagers) and high-gravity worts typically benefit from higher pitch rates and good oxygen management.
Important note
This calculator is an educational planning tool, not an official Lallemand utility. Always cross-check with the latest technical data sheets and strain-specific recommendations for your exact yeast product.