This calculator converts Brix to Specific Gravity (SG) and Specific Gravity (SG) to Brix. Some hydrometers display only one of these values, which is where this tool becomes useful.
It also estimates potential alcohol by volume, which is especially useful for dry wines and high-sugar fermentations. The higher the sugar content, the higher the potential alcohol in the finished product.
Wine makers typically use Brix. Professional brewers often use Plato, while homebrewers usually work with Specific Gravity.
You can also explore our related tools, including the Hydrometer Temperature Adjustment Calculator and the ABV Calculator.
Conversion Formulas
Brix → Specific Gravity (SG)
SG = (Brix / (258.6 - ((Brix / 258.2) × 227.1))) + 1
Specific Gravity (SG) → Brix
Brix = (((182.4601 × SG - 775.6821) × SG + 1262.7794) × SG - 669.5622)
How It Works
Brix measures the percentage of sugar in a solution. Specific Gravity measures density compared to water. Both values are used to estimate sugar content, track fermentation, and calculate alcohol potential.
As fermentation progresses, sugar is converted into alcohol and carbon dioxide, lowering both Brix and gravity readings.
Important Notes
- Higher Brix or SG values indicate higher sugar concentration
- Higher sugar leads to higher potential alcohol
- Always consider temperature when taking hydrometer readings
Brewing Terms Explained
Brix
A scale that measures the sugar content in a liquid. Commonly used in winemaking and with refractometers.
Specific Gravity (SG)
A measurement of liquid density compared to water. Used by brewers to track fermentation and calculate alcohol.
Plato
A scale very similar to Brix, commonly used in professional brewing to measure sugar content.
Potential Alcohol
An estimate of how much alcohol can be produced based on the sugar available before fermentation.
Hydrometer
A tool used to measure specific gravity and monitor fermentation progress.
Refractometer
A compact tool that measures sugar content using light refraction, requiring only a small sample.
Liberty Craft Journal Note
At Liberty Craft Journal, we create practical brewing tools and clear guides to help you understand every stage of the brewing process — from sugar measurements to final alcohol content.