Convert cups to grams for common cooking and baking ingredients. Select your ingredient, enter the number of cups, and get the exact weight in grams — accounting for each ingredient's unique density. Results also show the equivalent in ounces.
Weight in Grams
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Weight in Ounces
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Density Used
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Volume (ml)
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It depends entirely on the ingredient. A US cup of water weighs 236.6 g, but a cup of all-purpose flour is only about 125 g because flour is much less dense. Always use an ingredient-specific converter rather than a single fixed number for accurate baking results.
One US cup of granulated sugar weighs approximately 201 grams. Brown sugar is slightly lighter at around 195 grams per cup, and powdered (icing) sugar is about 121 grams per cup because it is very finely ground and packs less tightly.
One US cup of butter weighs approximately 227 grams (about 2 sticks of butter in the US). Butter is denser than flour but less dense than water, so weight-based measurements are far more reliable for consistent baking.
One US cup of all-purpose flour is approximately 125 grams. Cake flour is lighter at around 114 g per cup, and bread flour is slightly heavier. Flour weight can vary significantly depending on how tightly it is packed into the cup, which is why weighing flour in grams is recommended for precise baking.
A US cup holds 236.588 ml, while a metric cup (used in Australia, Canada, and many other countries) holds exactly 250 ml. This is about a 5.5% difference — small enough to ignore in casual cooking but significant in precise baking recipes.
Each ingredient has a different density — that is, how much mass fits into a given volume. Dense liquids like honey (336 g/cup) weigh far more than airy powders like almond flour (96 g/cup). Using a weight-based conversion for your specific ingredient gives you the most accurate result.
Professional bakers nearly always weigh ingredients in grams because volume measurements like cups can vary based on how loosely or tightly an ingredient is packed. Weighing ensures consistent, repeatable results, especially for flour, sugar, and other dry ingredients.
You can estimate by finding the ingredient's density in grams per milliliter (g/ml), then multiplying: grams = cups × cup_volume_ml × density. For example, if your ingredient has a density of 0.8 g/ml and you're using a US cup (236.6 ml), then 1 cup ≈ 189 grams.