Calculate how many grams of corn sugar to add so bottled beer carbonates to the fizz you want.
| Dextrose | – |
Use this priming sugar calculator at bottling day when the beer is in the bucket and you need a priming dose for a given carbonation.
Dextrose mass ≈ beer litres × volumes of CO₂ × 3.7. That 3.7 is a kitchen factor for beer around 20 °C; leftover CO₂ already in the beer and how fermentable the sugar is are ignored. Table sugar needs a slightly higher mass for the same carbonation. Beer volume can be litres or gallons.
Beer: Volume of beer you are bottling. 19 L is a typical 5-gallon homebrew batch.
Volumes CO₂: Volumes of CO₂ you want. 2.4 is a common pale-ale fizz; lagers often sit higher, British bitters lower.
Dextrose: Mass of corn sugar (dextrose) to dissolve for priming.
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