Cups to Grams Converter

How this is calculated

A cup is a measure of VOLUME. A gram is a measure of MASS. There is no conversion between them without knowing what is in the cup, which is why every ingredient has its own number and why a single 'cups to grams' figure does not exist. The weights here are King Arthur Baking's published ingredient weight chart, which is the reference most English-language recipes are consistent with: All-purpose flour 120 g. Granulated sugar 198 g. Brown sugar, packed 213 g. Butter 226 g (two US sticks of 113 g). Honey 336 g. Milk 227 g. Rolled oats 89 g. Unsweetened cocoa powder 84 g. Water 236 g, which is simply its volume. Bread flour is also 120 g per cup - identical to all-purpose. The two differ in protein content, not in how much a cup holds, so there is no separate conversion to look up. ⚠️ FLOUR IS THE ONE THAT RUINS RECIPES, and it is not because the number is uncertain - it is because scooping is. A cup dipped straight into the bag compacts the flour and can hold 140 grams or more instead of 120. That is up to seventeen percent extra flour in a recipe where flour is the structural ingredient, and it is the single most common cause of dry, heavy baking. The intended method is to spoon flour into the cup and level it off, or better, to weigh it. That is the real argument for scales: not that grams are more precise in principle, but that a cup of flour is genuinely a different amount of flour depending on who fills it, and a gram is not. BROWN SUGAR IS MEASURED PACKED unless a recipe says otherwise - pressed firmly into the cup so it holds its shape when turned out. Loose brown sugar weighs substantially less, and this is one of the few places where the packing is part of the specification rather than an accident. A US CUP IS 236.6 ML. A metric cup is 250 ml and an Imperial cup was 284 ml. If a recipe's origin is unclear, the ingredient weight is a better guide than the volume - which is another reason to work in grams. BUTTER IS EASIER THAN THIS SUGGESTS. A US stick is 113 g, half a cup, and the wrapper is printed with tablespoon markings. You rarely need to measure butter by volume at all. Liquids are the one place cups behave well: water, milk and stock are close enough to their volume that a measuring jug is fine.

Common questions

Why isn't there one cups-to-grams number?

Because a cup measures volume and a gram measures mass, and the bridge between them is density - which is a property of the ingredient, not of the cup. A cup of cocoa powder is 84 grams and a cup of honey is 336. They are the same volume and four times apart in weight. Any tool offering a single conversion is either assuming an ingredient or assuming water, and it will be wrong for almost everything you bake.

Why does flour cause so much trouble?

Not because 120 grams is uncertain, but because scooping is. Dip a measuring cup straight into the bag and the flour compacts - you can end up with 140 grams or more where the recipe wanted 120. That is up to seventeen percent extra of the ingredient that provides the structure, and it is the most common reason home baking comes out dry and heavy. The intended method is to spoon flour into the cup and level it off with a straight edge. Weighing it removes the problem entirely.

Is bread flour a different weight?

No - bread flour is also 120 grams per cup, the same as all-purpose. The difference between them is protein content, which changes how the dough behaves rather than how much a cup holds. It is worth knowing because people go looking for a separate conversion that does not exist, and because it means you can weigh either one against the same figure.

Is a scale really worth it?

For baking, yes, and the reason is more specific than 'grams are more precise'. A cup of flour is genuinely a different quantity of flour depending on how it was filled; 120 grams is 120 grams regardless of who measures it. That is not precision for its own sake, it is the removal of a real and large source of variation. It also means fewer things to wash, since most of a recipe can go into one bowl on a scale.

What does 'packed' mean for brown sugar?

Pressed firmly into the cup so it holds the cup's shape when turned out. Brown sugar is one of the few ingredients where the packing is part of the specification rather than an accident of measuring, because loose brown sugar occupies far more volume for the same weight. If a recipe says a cup of brown sugar and does not specify, packed is the convention.

Are all cups the same size?

No. A US cup is 236.6 millilitres, a metric cup is 250, and the old Imperial cup was 284. That is a spread of about twenty percent between the extremes, which matters in baking. If you cannot tell where a recipe is from, the ingredient weight is a more reliable guide than the volume - one more argument for working in grams, where the question does not arise.

What about butter?

Easier than the rest. A US stick is 113 grams, which is half a cup, and the wrapper is printed with tablespoon markings you can cut straight through. You rarely need to measure butter by volume at all, and pressing butter into a measuring cup is one of the more unpleasant jobs in a kitchen. Liquids are the other easy case - water, milk and stock are close enough to their volume that a jug is fine.

Take it further with AI

Copy this into ChatGPT or Claude with your own numbers filled in. It hands over the figures this calculator worked out, so the answer is built on real arithmetic instead of a guess.

I used the Cups to Grams Converter at https://www.bfcbrilliance.com/tools/cooking-measurement-converter.

What I entered:
- Cups (cups): ___
- Ingredient: ___

What it calculated:
- Grams: ___
- Ounces: ___
- Pounds: ___
- Tablespoons: ___
- Teaspoons: ___

Use those figures as given — they are already worked out, so please don't recalculate or estimate your own. Help me turn them into a plan: what to buy or do, in what order, roughly what it should cost, and the mistakes people most often make with this job.

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