- A scale of density based on sugar syrups and measured in degrees. The degree Brix, °Brix, is the percentage by weight of sugar in a sugar water solution at 20°C. Thus 100°Brix is pure sugar, 50°Brix is equal weights of sugar and water i.e. 1 kg of sugar per litre of water. Some hydrometers are calibrated in °Brix.
- a density scale used in the US to measure the specific gravity of a liquid. In winemaking it is used to check the sugar levels in grape juice and so estimate the ripeness of grapes and predict the eventual alcohol content of a wine produced from those grapes.