Cups to Grams Converter
Turn any cup measurement into grams. Because a cup measures volume, the answer depends on the ingredient, so pick yours below for an accurate weight.
1 cup=125 g
All-Purpose Flour: 125 g per US cup. See full table →
Grams in a cup of common ingredients
| Ingredient | 1 cup in grams | 1/2 cup |
|---|---|---|
| Flour | 125 g | 63 g |
| Sugar | 200 g | 100 g |
| Butter | 227 g | 114 g |
| Brown sugar | 220 g | 110 g |
| Powdered sugar | 120 g | 60 g |
| Water | 240 g | 120 g |
| Milk | 244 g | 122 g |
| Honey | 340 g | 170 g |
| Cocoa | 85 g | 43 g |
| Oats | 90 g | 45 g |
Why cups to grams is not one number
The single most common mistake in kitchen conversion is assuming a cup always weighs the same. It does not. A cup is a measure of volume, the space something takes up, while a gram is a measure of mass, how much it weighs. The bridge between the two is density, and density varies enormously from ingredient to ingredient. A cup of light, airy all-purpose flour weighs around 125 grams, but a cup of dense, sticky honey weighs about 340 grams. Using one conversion figure for both would leave your recipe badly off balance.
This is exactly why CupsToGrams asks you to choose an ingredient first. Each one carries its own density, stored as grams per US cup, and the converter uses it to translate cups, tablespoons and teaspoons into grams. The same density works in reverse, so you can also go from grams back to cups. Mass units like ounces and pounds convert straight to grams, because weight does not care what the ingredient is.
For everyday cooking, cup measures are perfectly fine. But for baking, where the ratio of flour to liquid to fat decides whether a cake is tender or tough, weighing in grams gives far more consistent results. Professional bakers almost always work by weight for this reason. A simple digital kitchen scale, combined with the grams figures here, takes the guesswork out of every recipe.
Grams in a cup by amount
Sometimes you know the amount but not the ingredient, or you just want a plain answer to "how many grams is half a cup". Each page below lists one cup measure in grams across every ingredient on the site, so you can find your amount and ingredient in one place. If your recipe or spreadsheet gives the amount as a decimal, the decimal form is shown next to each fraction.
Need the other direction? Use the grams to cups converter. Working with liquids? Try the cups to millilitres converter, or switch your oven with the temperature converter.
Frequently asked questions
How many grams are in a cup?
It depends entirely on the ingredient. A cup of water is about 240 grams, a cup of all-purpose flour is about 125 grams, a cup of granulated sugar is about 200 grams, and a cup of butter is 227 grams. There is no single answer because a cup measures volume, not weight.
Why can I not just use one cups to grams number?
Because different ingredients have different densities. A cup of feathers and a cup of lead would weigh very differently, and the same is true of flour versus honey. That is why this converter asks which ingredient you are measuring before giving you grams.
Is a US cup the same as a metric cup?
No. This converter uses the US cup at 240 millilitres, the most common assumption in recipes. A metric cup, used in Australia and parts of Europe, is 250 millilitres. You may also see the US cup given as 237 ml, its stricter customary definition; the 3 ml gap is irrelevant next to how differently an ingredient packs. Converting to grams avoids the question altogether.
How do I convert cups to grams accurately?
Choose your ingredient, enter the amount in cups, and read off the grams. Behind the scenes the tool multiplies the volume by that ingredient's density. For the most accurate results in baking, weigh with a kitchen scale rather than measuring by cup.