Kitchen Reference
A direct kitchen reference for 1/3 cup in grams, with ingredient examples, a clear formula, and a quick checker.
1/3 cup equals approximately 79 grams of water.
For common kitchen ingredients, 1/3 cup is about 42 grams of all-purpose flour, 67 grams of granulated sugar, 73 grams of packed brown sugar, 76 grams of butter, and 62 grams of uncooked white rice.
The exact gram amount changes by ingredient because cups measure volume and grams measure weight.
| Ingredient | Grams | Tablespoons |
|---|---|---|
| Water | About 79 g | About 5.3 tbsp |
| All-purpose flour | About 42 g | About 5.3 tbsp |
| Granulated sugar | About 67 g | About 5.3 tbsp |
| Brown sugar (packed) | About 73 g | About 5.3 tbsp |
| Butter | About 76 g | About 5.3 tbsp |
| Uncooked white rice | About 62 g | About 5.3 tbsp |
A cup measures volume, but grams measure weight. That is why 1/3 cup of flour does not weigh the same as 1/3 cup of sugar, butter, or rice.
Ingredient density is the main reason for the difference. Measuring method also matters, especially with packed brown sugar or loosely filled flour.
Grams = cups multiplied by grams per cup of the ingredient.
For water, one US cup weighs about 236.588 grams. So 0.33 multiplied by 236.588 gives about 79 grams. For flour, 0.33 multiplied by 125 gives about 42 grams.
This conversion is useful when a recipe gives a cup fraction but you want to weigh the ingredient for better accuracy, easier scaling, or consistent baking results.
It is especially helpful for cookies, cakes, sauces, and small-batch recipes where small measurement differences can change the result.
These pages help when you are moving between cup fractions, full cups, and gram-based recipe measurements.
No. A 1/3 cup stays the same volume, but the weight changes because ingredients have different densities.
Using a common US reference of 125 grams per cup, 1/3 cup of all-purpose flour is about 42 grams.
Using a common US reference of 200 grams per cup, 1/3 cup of granulated sugar is about 67 grams.
For baking, grams are usually more repeatable because they avoid differences caused by scooping, packing, and cup size variation.
Choose an ingredient to estimate how much 1/3 cup weighs in grams.
Estimated Grams