How Much Is 1/3 Cup?
1/3 cup = 5 tablespoons + 1 teaspoon (79 ml).
In grams, it depends on the ingredient — 1/3 cup of all-purpose flour is about 42 grams, but 1/3 cup of granulated sugar is about 67 grams.
1/3 cup is one of the trickiest fractions in cooking because most measuring cup sets don't include a 1/3 cup measure as a separate piece — and because the weight varies wildly depending on what you're measuring.
1/3 Cup Conversion Table by Ingredient
| Ingredient | 1/3 Cup in Grams | 1/3 Cup in Oz | 1/3 Cup in ml |
|---|---|---|---|
| All-purpose flour | ~42 g | ~1.5 oz | 79 ml |
| Bread flour | ~43 g | ~1.5 oz | 79 ml |
| Granulated sugar | ~67 g | ~2.4 oz | 79 ml |
| Brown sugar (packed) | ~73 g | ~2.6 oz | 79 ml |
| Powdered sugar | ~40 g | ~1.4 oz | 79 ml |
| Unsalted butter | ~75 g | ~2.7 oz | 79 ml |
| Cocoa powder | ~28–33 g | ~1.0–1.2 oz | 79 ml |
| Milk | ~81 g | ~2.9 oz | 79 ml |
| Honey | ~113 g | ~4.0 oz | 79 ml |
| Rolled oats | ~30 g | ~1.1 oz | 79 ml |
| Peanut butter | ~86 g | ~3.0 oz | 79 ml |
| Rice (dry, long-grain) | ~65 g | ~2.3 oz | 79 ml |
Note: gram values assume standard measuring technique (spooned into cup, leveled). Sifted flour or packed sugar will give different weights.
Why the Weight Changes but the Volume Stays the Same
The volume is always 79 ml (1/3 of 237 ml = 1 US cup). But density varies by ingredient — flour is lighter and airier than sugar, which is heavier and more compact. That's why baking recipes from professional sources give weights in grams, not cups.
If you're baking anything where accuracy matters — bread, soufflés, macaron shells — use the gram value, not the cup measure. Your scale is more reliable than your measuring cup.
How to Measure 1/3 Cup Without a 1/3 Cup Measure
If your set doesn't include a 1/3 cup:
- Option 1: 5 tablespoons + 1 teaspoon (exact)
- Option 2: Half of 2/3 cup (use your 2/3 measure and fill halfway — rough approximation)
- Option 3: Use a kitchen scale with the gram values from the table above
Scale a Full Recipe Using This Measurement
Need 1/3 cup as part of a larger recipe you want to scale up or down?
Paste your full recipe text and change the serving size. Every ingredient — including fractions like 1/3 cup — adjusts automatically.
Related Conversions
FAQ
Q: Is 1/3 cup the same as 75 ml?
No. 1/3 of a US cup is 79 ml. (1 US cup = 237 ml ÷ 3 = 79 ml.) 75 ml is slightly less than 1/3 cup.
Q: How many tablespoons is 1/3 cup?
5 tablespoons + 1 teaspoon. (1 cup = 16 tablespoons, so 1/3 cup = 5.333 tablespoons = 5 tbsp + 1 tsp.)
Q: Is 1/3 cup of flour the same weight as 1/3 cup of sugar?
No. Flour is lighter (about 42g) and sugar is denser (about 67g) for the same 1/3 cup volume.