How many grams are in one cup?

It depends entirely on the ingredient. One US cup of all-purpose flour is about 125 g, one cup of granulated sugar is about 200 g, one cup of butter is about 227 g, and one cup of water is about 237 g. That is why a per-ingredient converter is more accurate than a single fixed number.

Is a cup measured by weight or volume?

A cup is a unit of volume (a US cup is about 236.6 ml). Grams measure weight. To convert between them you need the ingredient's density, which is exactly what this tool stores for each ingredient.

Are US cups and metric cups the same?

No. A US cup is about 236.6 ml, while a metric cup (used in Australia and parts of Europe) is 250 ml. The values on this site are based on the US cup.

Why do my conversions differ from another website?

Density changes with how an ingredient is packed, sifted, or scooped. Flour scooped straight from the bag can weigh 20-30 g more per cup than flour that is spooned and leveled. Small differences between sites are normal.

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Cups to Grams Converter

Pick an ingredient and get an accurate gram weight instantly. A cup of flour and a cup of honey weigh very differently — so this converter uses the real density of each ingredient.

Amount

Unit

Ingredient

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Approximate values. Density varies with how the ingredient is packed, sifted, or measured.

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Convert a specific ingredient

Open any ingredient for its full cups, tablespoons and teaspoons conversion chart.

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Why a cup is not a fixed number of grams

Cups measure volume and grams measure weight. To turn one into the other you need to know how heavy a given ingredient is for the space it fills — its density. A cup of feathers and a cup of sand take up the same space but weigh wildly different amounts, and the same is true in the kitchen: one US cup of cocoa powder is only about 85 g, while one cup of honey is roughly 340 g. That four-times difference is why recipes that care about results — especially baking — increasingly list weights in grams.

This is also why measuring by weight is more reliable than measuring by cups. When you scoop flour directly from the bag, you compress it and trap more in the cup; when you spoon it in gently and level the top, you get less. Those two methods can differ by 20-30 g for the same "one cup," which is enough to change how a cake or bread turns out. A kitchen scale removes that guesswork, and the conversions here give you the target weight to aim for.

How to use this converter

Enter an amount, choose whether it is cups, tablespoons or teaspoons, and pick your ingredient. The result updates instantly in both grams and ounces, and you can flip to "Grams to Cups" for the reverse. For repeat conversions of a single ingredient, open its dedicated page from the list above — each one includes a ready-made chart for common amounts so you do not have to type anything.

Frequently asked questions

How many grams are in one cup?: It depends entirely on the ingredient. One US cup of all-purpose flour is about 125 g, one cup of granulated sugar is about 200 g, one cup of butter is about 227 g, and one cup of water is about 237 g. That is why a per-ingredient converter is more accurate than a single fixed number.
Is a cup measured by weight or volume?: A cup is a unit of volume (a US cup is about 236.6 ml). Grams measure weight. To convert between them you need the ingredient's density, which is exactly what this tool stores for each ingredient.
Are US cups and metric cups the same?: No. A US cup is about 236.6 ml, while a metric cup (used in Australia and parts of Europe) is 250 ml. The values on this site are based on the US cup.
Why do my conversions differ from another website?: Density changes with how an ingredient is packed, sifted, or scooped. Flour scooped straight from the bag can weigh 20-30 g more per cup than flour that is spooned and leveled. Small differences between sites are normal.