Enter the amount
Type how many cups or spoons you have.
Cups to grams converter
Pick an ingredient, enter the number of cups and get grams. A cup of flour and a cup of sugar do not weigh the same, so the converter uses the density of each ingredient.
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How it works
Pick the ingredient
For weight, choose the ingredient: flour, sugar and butter weigh differently.
Read the result
The result is shown in grams, millilitres or the unit you choose.
How to convert cups to grams
To convert cups to grams, choose the ingredient and enter the number of cups. The tool multiplies the volume of a cup, 236.6 ml, by the density of the ingredient. One cup of plain flour is about 125 g, one cup of granulated sugar about 201 g and one cup of butter about 227 g. There is no single answer because cups measure volume and grams measure weight.
Grams per cup by ingredient
| Ingredient | 1/4 cup | 1/3 cup | 1/2 cup | 1 cup |
|---|---|---|---|---|
| Plain flour | 31 g | 42 g | 63 g | 125 g |
| Granulated sugar | 50 g | 67 g | 101 g | 201 g |
| Brown sugar (packed) | 53 g | 71 g | 106 g | 213 g |
| Icing sugar | 30 g | 39 g | 59 g | 118 g |
| Butter | 57 g | 76 g | 114 g | 227 g |
| Honey | 84 g | 112 g | 168 g | 336 g |
| Rice (uncooked) | 46 g | 62 g | 92 g | 185 g |
| Rolled oats | 22 g | 30 g | 45 g | 90 g |
| Cocoa powder | 21 g | 28 g | 43 g | 85 g |
| Oil | 54 g | 73 g | 109 g | 218 g |
| Table salt | 71 g | 95 g | 142 g | 284 g |
| Milk | 61 g | 81 g | 122 g | 244 g |
| Water | 59 g | 79 g | 118 g | 237 g |
Why cups and grams do not convert one to one
A cup is a measure of volume and a gram is a measure of weight, so the conversion depends on how dense the ingredient is. Water weighs about 237 g per cup, while flour, which is full of air, weighs about half of that. Densities are averages: how you fill the cup changes the weight.
Cups and spoons around the world
| Measure | US | Metric (UK, Canada, Australia, NZ) | Old UK imperial |
|---|---|---|---|
| Cup | 236.6 ml | 250 ml | 284 ml |
| Tablespoon | 14.8 ml | 15 ml (Australia: 20 ml) | 17.7 ml |
| Teaspoon | 4.9 ml | 5 ml | 5.9 ml |
Measuring tips for baking
- Weigh when you can. A kitchen scale is the most reliable way to bake, because it removes the differences between cups.
- Spoon and level flour. Scooping with the cup packs it and can add 20% or more to the weight.
- Pack brown sugar into the cup, as most recipes expect, and do not pack flour or icing sugar.
- Check where the recipe comes from: a cup in an Australian recipe is 250 ml, not 237 ml.
Private by design
Everything is calculated in your browser as you type; nothing is sent to a server.
Frequently asked questions
How many grams are in a cup?
It depends on the ingredient: about 125 g for flour, 201 g for granulated sugar, 227 g for butter and 237 g for water or milk, using the US cup of 236.6 ml.
Is a cup always 240 ml?
No. The US cup is 236.6 ml, the metric cup used in Australia, New Zealand and Canada is 250 ml, and many recipes round to 240 ml. The difference is small for one cup but adds up in large quantities.
Why does my scale give a different number?
Because flour and other powders vary with how they are packed, sifted and stored. The converter gives an average, and your own measurement of your ingredient is the best guide.
Is this converter free?
Yes. There is no sign-up and no limit, and it runs in your browser, so nothing you type is sent to a server.
Does it work on a phone?
Yes. It works in any modern mobile browser, and the result updates as you type.
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