Convert cup to grams by ingredient: wheat flour (120 g), sugar (200 g) and butter (225 g). The mass depends on the density of each ingredient.
Converting cups to grams is one of the most searched kitchen conversions, but it carries a frequent trap: the cup measures volume, while the gram measures mass — and the relationship between the two depends on the ingredient's density. That is why 1 cup of wheat flour does not weigh the same as 1 cup of sugar or butter, even though all correspond to 240 ml in the Brazilian standard. This converter uses the 240 ml Brazilian cup and the average densities most adopted in recipes and nutrition tables: wheat flour ≈ 120 g per cup (density ≈ 0.5 g/ml), refined sugar ≈ 200 g per cup (density ≈ 0.83 g/ml), and butter ≈ 225 g per cup (density ≈ 0.94 g/ml). These values are practical references; the actual mass may vary depending on the brand, packing, and sifting of the ingredient. It is essential to understand that there is no single "cup to grams" factor: each ingredient has its own. That is why the converter separates units by ingredient, making clear that the mass depends on the chosen ingredient. It is useful for anyone adapting international recipes, adjusting portions in pastry and baking (where precision matters), or converting labels of imported products.
In the Brazilian standard (240 ml), 1 cup of wheat flour ≈ 120 g.
1 cup of refined sugar (240 ml) ≈ 200 g.
1 cup of butter (240 ml) ≈ 225 g.
Because the cup measures volume and the gram measures mass. The relationship depends on the density of the ingredient — flour, sugar, and butter have different densities.
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