1/3 Cup in Grams
1/3 cup weighs 40 grams of all-purpose flour, 67 grams of granulated sugar, or 76 grams of butter — a cup is a volume, so the weight always depends on what's in it. Find your ingredient below; densities verified against King Arthur and USDA data.
What is 1/3 cup in grams?
| Ingredient | Grams | Ounces |
|---|---|---|
| all-purpose flour | 40 g | 1.4 oz |
| granulated sugar | 67 g | 2.4 oz |
| powdered sugar | 40 g | 1.4 oz |
| brown sugar (packed) | 71 g | 2.5 oz |
| honey | 113 g | 4 oz |
| butter | 76 g | 2.7 oz |
| milk (whole) | 82 g | 2.9 oz |
| uncooked white rice | 62 g | 2.2 oz |
| rolled oats | 30 g | 1.1 oz |
| chocolate chips | 57 g | 2 oz |
| cocoa powder | 28 g | 1 oz |
| water | 80 g | 2.8 oz |
Why there's no single answer
Grams measure weight; cups measure volume. 1/3 cup of feather-light powdered sugar (40 g) and 1/3 cup of dense honey (113 g) fill the same cup at nearly a 3× weight difference. Recipes that list grams remove that ambiguity — which is why serious baking recipes weigh.
Other amounts
Convert any amount
250 cups All-purpose flour = 30000 g
Based on 120 g per US cup.
Data verified 2026-08-20 · Methodology & sources