Calculadora de Açúcar de Primagem (cerveja)

The Priming Sugar Calculator helps homebrewers determine the exact amount of sugar to add before bottling, ensuring proper carbonation in the bottle. Priming involves fermenting a small amount of residual sugar inside the sealed container, producing CO2 that dissolves into the beer. The calculator uses a formula that considers beer volume, desired CO2 level, residual CO2 after fermentation, and the type of sugar used.

The calculation is done by the formula: priming (in grams) = (CO2_target - CO2_residual) × volume (in liters) × sugar factor. Residual CO2 depends on the maximum fermentation temperature, as gas solubility varies with temperature. The sugar factor is specific to each type: corn sugar (0.91), cane sugar (1.0), brown sugar (1.09), and honey (1.4). For example, for 20 liters of beer with residual CO2 of 0.8 volumes and target of 2.5 volumes, using cane sugar, you would need (2.5 - 0.8) × 20 × 1.0 = 34 grams.

Use this calculator whenever you bottle homebrew, especially if you want consistency between batches. It is useful for styles that require specific carbonation, such as a Weissbier (high carbonation) or a Stout (low). Remember that fermentation temperature directly influences residual CO2: the higher the temperature, the less dissolved CO2. Additionally, the type of sugar affects not only carbonation but also the final flavor, especially with brown sugar or honey.

Important precautions: avoid using common refined sugar, as it may contain additives that affect the beer. Always boil the sugar in water to dissolve and sterilize before adding to the bottling bucket. Stir gently to avoid oxygenating the beer. The calculator provides a theoretical estimate; factors such as fermentation efficiency and losses may require adjustments. For greater accuracy, measure the actual beer temperature at bottling time and use residual CO2 tables by temperature.