1/3 Cup of Flour in Grams
1/3 cup of all-purpose flour weighs 40 grams (about 1.4 oz), based on 120 g per US cup (spoon-and-level method). That's the same as 5.3 tablespoons of all-purpose flour. When a recipe's outcome depends on accuracy — especially baking — weigh it instead of measuring by cup.
Flour — all cup fractions in grams
| Cups | Grams | Ounces |
|---|---|---|
| ¼ cups | 30 g | 1.1 oz |
| ⅓ cups | 40 g | 1.4 oz |
| ½ cups | 60 g | 2.1 oz |
| ⅔ cups | 80 g | 2.8 oz |
| ¾ cups | 90 g | 3.2 oz |
| 1 cup | 120 g | 4.2 oz |
| 1½ cups | 180 g | 6.3 oz |
| 2 cups | 240 g | 8.5 oz |
How to measure 1/3 cup of all-purpose flour
Spoon flour into the cup with a spoon, then level the top with a straight edge — never scoop the cup into the bag. Scooping compresses flour and can pack in 20–30% more (140 g+ instead of 120 g), which is the single most common reason baked goods turn out dry. Sifted flour runs lighter still, about 110 g per cup.
1/3 cup of other ingredients
- 1/3 cup granulated sugar in grams — 67 g
- 1/3 cup powdered sugar in grams — 40 g
- 1/3 cup brown sugar (packed) in grams — 71 g
- 1/3 cup honey in grams — 113 g
- 1/3 cup butter in grams — 76 g
Convert another amount
250 cups All-purpose flour = 30000 g
Based on 120 g per US cup.
Reverse conversion: grams of flour to cups.
Density 120 g/cup — sources: King Arthur Baking ingredient weight chart, USDA FoodData Central. Data verified 2026-08-20. Methodology.