In Australia, granulated sugar is labeled as white sugar and is most commonly used in baking and as an additive to hot beverages like tea and coffee. Granulated sugar is larger and more coarse than caster sugar, which is finer and dissolves more easily. Granulated sugar is 99% sucrose, while brown sugars vary between 85-92% . If a recipe calls for caster sugar, it is different from granulated sugar, and it is best to measure by weight rather than volume. In most recipes, granulated sugar can be substituted for caster sugar and vice versa, but one cup of granulated sugar does not equal one cup of caster sugar.