Convert cups to grams for every ingredient in your recipe.
A cup of flour and a cup of honey weigh nothing alike. Pick your ingredient and CupsToGrams uses its real density to convert cups, tablespoons, millilitres, ounces and pounds into accurate grams.
1 cup=125 g
All-Purpose Flour: 125 g per US cup. See full table →
Ingredient aware
Every conversion uses the density of the ingredient you choose, so a cup of cocoa never gets treated like a cup of sugar.
Trusted anchors
Built on the numbers bakers rely on: butter at 227 g per cup, water at 240 g, flour near 125 g and sugar near 200 g.
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| Ingredient | Grams per US cup (240 ml) |
|---|---|
| Butter | 227 g |
| Water | 240 g |
| All-Purpose Flour | 125 g |
| Granulated Sugar | 200 g |
| Honey | 340 g |
Convert a specific amount
Looking up a plain cup amount rather than a specific ingredient? Each page below shows one measure in grams across every ingredient, from an eighth of a cup to three cups. Fractions and decimals land on the same page, so 1/4 cup and 0.25 cups are answered together.
Flours & starches
Sugars & sweeteners
Dairy & fats
Baking staples
Grains, nuts & extras
Baking something in the oven? Use the oven temperature converter to switch between Celsius, Fahrenheit and gas mark.
Why a cup is not a fixed weight
Cup measurements are quick and forgiving, but they hide a problem: a cup measures volume, not weight. Fill a cup with all-purpose flour and you have roughly 125 grams. Fill the same cup with honey and you are holding about 340 grams. That is nearly three times the weight from the same measuring cup, simply because honey is far denser than flour. This is why serious bakers reach for a kitchen scale and why a good converter has to know which ingredient you are measuring.
CupsToGrams solves this by storing a density for every ingredient, expressed as grams per US cup. When you convert from a volume unit like cups or tablespoons into grams, the tool multiplies by that density. When you convert the other way, it divides. Mass units such as grams, ounces and pounds convert directly by weight, since they do not depend on the ingredient at all. The result is a conversion that respects the real physics of what is in your bowl.
US cups, metric cups and the numbers we use
One more source of confusion is that not all cups are equal. CupsToGrams works in US cups, the most common assumption in recipe writing, using 240 millilitres as the working volume for a cup. An Australian metric cup is 250 millilitres and the old British imperial cup is 284.1 millilitres, a spread of nearly 20 percent across the standards in use. Our cup sizes by country reference lists every one of them with the same ingredients weighed in each. Whenever you are unsure, converting to grams removes the ambiguity entirely, because a gram is a gram no matter which country wrote the recipe.
Pick any ingredient from the grid above to open a dedicated page with a full reference table, from a quarter cup up to three cups, plus a short guide to measuring it well. Or start typing in the converter at the top to get an answer straight away. Recipe gives you grams but you only own measuring cups? The grams to cups converter works the other way round, and the tablespoons to grams guide covers spoon measures.
Frequently asked questions
Why is a cup not a fixed weight?
A cup measures volume, not weight. A cup of all-purpose flour weighs roughly 125 grams while a cup of honey weighs about 340 grams, because honey is far denser than flour. That is why this converter asks which ingredient you are measuring.
Does this converter use US or metric cups?
It works in US cups, the most common assumption in recipe writing, using 240 millilitres as the working volume for a cup. A metric cup is 250 millilitres. Converting to grams removes the ambiguity entirely.
How does an ingredient-aware conversion work?
Every ingredient has a stored density in grams per US cup. Converting from a volume unit like cups or tablespoons into grams multiplies by that density; converting back divides. Mass units such as grams, ounces and pounds convert directly by weight.