40 Grams to Cups
40 grams converts to a different number of cups depending on the ingredient. See how much 40g of flour, sugar, butter, and more equals in cups below.
40 grams of all-purpose flour ≈
0.33 US cups
About ⅓ cup
Based on 1 US cup of all-purpose flour = 120g
Sources: King Arthur Baking — Ingredient Weight Chart · USDA FoodData Central — Wheat flour, white, all-purpose, enriched, bleached (FDC 168894)
Data last verified: 2026-07-18
40g to cups by ingredient
| Ingredient | Grams per cup | 40g in cups | Kitchen fraction |
|---|---|---|---|
| All-purpose flour | 120g | 0.33 cups | ⅓ cup |
| Granulated sugar | 198g | 0.20 cups | 3 tablespoons + ½ teaspoon |
| Butter | 227g | 0.18 cups | 2 tablespoons + 2 ½ teaspoons |
| Water | 240g | 0.17 cups | 2 tablespoons + 2 teaspoons |
| Milk | 244g | 0.16 cups | 2 tablespoons + 2 teaspoons |
| Bread flour | 120g | 0.33 cups | ⅓ cup |
| Honey | 339g | 0.12 cups | 1 tablespoon + 2 ½ teaspoons |
| Cocoa powder | 84g | 0.48 cups | ⅜ cup + 1 tablespoon + 2 teaspoons |
| Cake flour | 120g | 0.33 cups | ⅓ cup |
| Maple syrup | 315g | 0.13 cups | 2 tablespoons |
| Long-grain white rice (dry) | 185g | 0.22 cups | 3 tablespoons + 1 ½ teaspoons |
| Cornstarch | 128g | 0.31 cups | ¼ cup + 1 tablespoon |
| Rolled oats | 89g | 0.45 cups | ⅜ cup + 1 tablespoon + ½ teaspoon |
| Vegetable oil (soybean) | 218g | 0.18 cups | 3 tablespoons |
| Olive oil | 216g | 0.19 cups | 3 tablespoons |
| Plain whole-milk yogurt | 245g | 0.16 cups | 2 tablespoons + 2 teaspoons |
| Brown sugar (packed) | 220g | 0.18 cups | 2 tablespoons + 2 ½ teaspoons |
| Table salt (fine) | 288g | 0.14 cups | 2 tablespoons + ½ teaspoon |
| Powdered sugar | 120g | 0.33 cups | ⅓ cup |
| Almond flour | 96g | 0.42 cups | ⅓ cup + 1 tablespoon + 1 teaspoon |
Conversions are approximate and may vary by ingredient brand, packing, humidity, and measuring method. Spoons: 15 ml tablespoon, 5 ml teaspoon. Kitchen estimates have up to 10% volume rounding error; very small amounts use a threshold. See Methodology for the policy.
This table uses the US cup / 240 ml
If your recipe uses a metric or US customary cup, the result will differ slightly — switch cup sizes and enter any gram amount in the calculator.
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Frequently asked questions
How many cups is 40 grams of flour?
40 grams of flour is about 0.33 cups, based on 1 US cup of flour = 120g.
How many cups is 40 grams of sugar?
40 grams of sugar is about 0.20 cups, based on 1 US cup of sugar = 198g.
Why does 40g convert to a different number of cups for each ingredient?
Grams measure weight and cups measure volume, so the result depends on how dense each ingredient is. That's why 40g of flour, sugar, and butter each equal a different number of cups — see the table above for each one.
Which cup size does this page use?
This table uses the US cup / 240 ml. If your recipe uses a metric or US customary cup, the result will differ slightly — switch cup sizes and enter any gram amount in the calculator.
Can I convert 40g to cups for an ingredient not listed here?
No. A conversion needs reliable grams-per-cup data for the ingredient, and this page only converts the ingredients listed in the table above. For an ingredient that is not in the table, weigh the grams your recipe gives instead of converting them to cups.