40 Grams of Flour to Cups
40 grams of all-purpose flour equals ⅓ cup (0.33 US cups), based on 120 g per cup (spoon-and-level method). In the kitchen, measure 5 tbsp. For best results, weigh all-purpose flour with a scale — cup measurements vary with how the cup is filled.
Small amounts like this fit in a single cup measure with room to spare; the fraction matters more than the cup, so level carefully.
How much is 40 grams of all-purpose flour?
| US cups | ⅓ cup (0.33 cups) |
|---|---|
| Measured as | 5 tbsp |
| Ounces (weight) | 1.4 oz |
| Tablespoons (level) | about 5.3 tbsp |
| Density used | 120 g per US cup |
Seeing a different answer elsewhere? Sources disagree on flour: King Arthur's spoon-and-level standard is 120 g per cup (our number, giving ⅓ cup), while USDA-based tables use 125 g (giving ⅓ cup, 0.32 cups). Both are correct for their measuring method — see how we measure.
How to measure 40 g of all-purpose flour without a scale
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.
Nearby amounts
| Grams | Cups | Decimal |
|---|---|---|
| 15 g | ⅛ cup | 0.13 |
| 20 g | ⅛ cup | 0.17 |
| 25 g | ¼ cup | 0.21 |
| 30 g | ¼ cup | 0.25 |
| 50 g | ⅜ cup | 0.42 |
| 60 g | ½ cup | 0.5 |
| 70 g | ⅝ cup | 0.58 |
| 75 g | ⅝ cup | 0.63 |
40 grams of other ingredients
The same weight fills a very different cup depending on density — that's why "grams to cups" always needs the ingredient:
- 40 g of granulated sugar to cups — ¼ cup
- 40 g of butter to cups — ⅛ cup
Convert another amount
250 g All-purpose flour = 2 ⅛ cups
Exactly 2.08 cups — or measure 2 cups + 1 tbsp.
More flour conversions: the full grams-to-cups flour chart · 1/3 cups of all-purpose flour in grams
Density 120 g/cup — sources: King Arthur Baking ingredient weight chart, USDA FoodData Central. Data verified 2026-08-20. Methodology.