1/3 cup in Grams
1/3 cup (0.33 cups) is about 42 g of flour, 67 g of sugar and 76 g of butter. A third of a cup sits between a quarter and a half, and it turns up constantly in cakes and muffins where quantities do not divide neatly. It is the hardest common fraction to judge by eye, which is exactly why a gram figure helps: a third of a cup of flour is about 42 grams and a third of a cup of sugar about 67 grams.
Quick answer: a third of a cup, written 0.33 cups in decimal form, is 80 ml. In grams it is about 42 g of flour, 67 g of sugar, 76 g of butter and 80 g of water. Milk is close to 81 g.
1/3 cup (0.33 cups) in grams for every ingredient
A cup is a measure of volume, so a third of a cup weighs a different amount for each ingredient depending on how dense it is. The table lists 1/3 cup in grams and ounces for 45 common baking ingredients. Tap any ingredient for its full cup to gram table and a guide to measuring it well.
| Ingredient | 1/3 cup in grams | In ounces |
|---|---|---|
| All-Purpose Flour | 41.7 g | 1.47 oz |
| Bread Flour | 42.3 g | 1.49 oz |
| Cake Flour | 40 g | 1.41 oz |
| Whole Wheat Flour | 40 g | 1.41 oz |
| Granulated Sugar | 66.7 g | 2.35 oz |
| Brown Sugar | 73.3 g | 2.59 oz |
| Powdered Sugar | 40 g | 1.41 oz |
| Honey | 113 g | 4 oz |
| Maple Syrup | 107 g | 3.79 oz |
| Butter | 75.7 g | 2.67 oz |
| Milk | 81.3 g | 2.87 oz |
| Heavy Cream | 79.3 g | 2.8 oz |
| Yogurt | 81.7 g | 2.88 oz |
| Cream Cheese | 77.3 g | 2.73 oz |
| Shredded Cheese | 37.7 g | 1.33 oz |
| Water | 80 g | 2.82 oz |
| Vegetable Oil | 72.7 g | 2.56 oz |
| Cocoa Powder | 28.3 g | 0.999 oz |
| Cornstarch | 42.7 g | 1.51 oz |
| Baking Soda | 73.3 g | 2.59 oz |
| Baking Powder | 64 g | 2.26 oz |
| Salt | 91 g | 3.21 oz |
| Rolled Oats | 30 g | 1.06 oz |
| Uncooked Rice | 61.7 g | 2.18 oz |
| Chopped Nuts | 40 g | 1.41 oz |
| Breadcrumbs | 36 g | 1.27 oz |
| Peanut Butter | 86 g | 3.03 oz |
| Cornmeal | 40.7 g | 1.43 oz |
| Corn Syrup | 109 g | 3.86 oz |
| Molasses | 112 g | 3.96 oz |
| Sour Cream | 76.7 g | 2.7 oz |
| Coconut Oil | 72.7 g | 2.56 oz |
| Desiccated Coconut | 31 g | 1.09 oz |
| Raisins | 55 g | 1.94 oz |
| Chocolate Chips | 56.7 g | 2 oz |
| Almond Flour | 32 g | 1.13 oz |
| Powdered Milk | 42.7 g | 1.51 oz |
| Semolina | 55.7 g | 1.96 oz |
| Olive Oil | 72 g | 2.54 oz |
| Quinoa | 56.7 g | 2 oz |
| Panko Breadcrumbs | 16.7 g | 0.588 oz |
| Vanilla Extract | 69.3 g | 2.45 oz |
| Parmesan Cheese | 33.3 g | 1.18 oz |
| Granola | 37.7 g | 1.33 oz |
| Graham Cracker Crumbs | 34 g | 1.2 oz |
Why a third of a cup is not a single weight
The reason 1/3 cup of flour and 1/3 cup of honey weigh nothing alike is density. Flour is light and full of air, so a third of a cup of it is only about 42 grams. Honey is one of the densest things in the kitchen, so the same a third of a cup weighs far more. To turn a volume like a third of a cupinto grams you multiply by the ingredient's density in grams per cup, which is exactly what the table above does for you.
For everyday cooking, measuring a third of a cup with a measuring cup is perfectly fine. For baking, where the ratio of flour to sugar to fat decides whether a cake is tender or dense, weighing to the gram is far more reliable. A simple digital scale plus the figures here takes the guesswork out of it. Need a different amount? Try the cups to grams converter, or pick another common measure below.
Frequently asked questions
How many grams is 1/3 cup?
There is no single answer, because a cup measures volume and different ingredients have different densities. A third of a cup of flour is about 42 grams, of sugar about 67 grams, of butter about 76 grams and of water about 80 grams. The full table above lists 1/3 cup in grams for 45 ingredients.
How many grams is 0.33 cups?
0.33 cups is the decimal way of writing 1/3 cup (1/3 cup is 0.333 cups, which rounds to 0.33), so the two are the same measure and the same page answers both. 0.33 cups is 80 ml, and in grams it is about 42 g of flour, 67 g of sugar, 76 g of butter and 80 g of water. Because a cup measures volume, the weight of 0.33 cups changes with the ingredient, so read the exact figure from the table above.
How many grams is 1/3 cup of flour?
A third of a cup of all-purpose flour is about 42 grams when spooned and levelled. Scooping straight from the bag packs in extra flour, so weighing is the reliable way to hit 42 grams.
How many grams is 1/3 cup of sugar?
A third of a cup of granulated white sugar is about 67 grams. Sugar is dense and does not compress much, so a levelled cup and a scooped cup come out close.
How many grams is 1/3 cup of butter?
A third of a cup of butter is about 76 grams. A full US cup of butter is 227 grams, which is two sticks or half a pound, so 1/3 cup scales directly from that.
Is 1/3 cup the same in US and metric cups?
This page uses US cups, where one cup is 240 millilitres, so 1/3 cup is 80 millilitres. A metric cup is 250 millilitres, so the same fraction holds a little more. Converting to grams removes the difference entirely.