Cups to Grams Conversion Chart
How many grams are in a cup? It depends on the ingredient. For the baking staples: 1 cup of all-purpose flour = 120 g, 1 cup of granulated sugar = 200 g, and 1 cup of butter = 227 g. A cup measures volume, so its weight in grams changes with each ingredient’s density. The chart below gives exact gram weights for 17 common baking ingredients across every cup fraction from ¼ to 1 cup.
Cup-to-Gram Weights by Ingredient
| Ingredient | 1 cup | ¾ cup | ⅔ cup | ½ cup | ⅓ cup | ¼ cup |
|---|---|---|---|---|---|---|
| All-Purpose Flour | 120 g | 90 g | 80 g | 60 g | 40 g | 30 g |
| Bread Flour | 127 g | 95 g | 85 g | 64 g | 42 g | 32 g |
| Cake Flour | 114 g | 86 g | 76 g | 57 g | 38 g | 29 g |
| Whole Wheat Flour | 120 g | 90 g | 80 g | 60 g | 40 g | 30 g |
| Granulated Sugar | 200 g | 150 g | 133 g | 100 g | 67 g | 50 g |
| Brown Sugar (packed) | 220 g | 165 g | 147 g | 110 g | 73 g | 55 g |
| Powdered Sugar | 112 g | 84 g | 75 g | 56 g | 37 g | 28 g |
| Butter | 227 g | 170 g | 151 g | 113 g | 76 g | 57 g |
| Cocoa Powder | 85 g | 64 g | 57 g | 42 g | 28 g | 21 g |
| Rolled Oats | 90 g | 67 g | 60 g | 45 g | 30 g | 22 g |
| Rice (uncooked) | 185 g | 139 g | 123 g | 93 g | 62 g | 46 g |
| Honey | 340 g | 255 g | 227 g | 170 g | 113 g | 85 g |
| Milk | 245 g | 184 g | 163 g | 123 g | 82 g | 61 g |
| Water | 237 g | 177 g | 158 g | 118 g | 79 g | 59 g |
| Salt (table) | 288 g | 216 g | 192 g | 144 g | 96 g | 72 g |
| Cornstarch | 120 g | 90 g | 80 g | 60 g | 40 g | 30 g |
| Chocolate Chips | 170 g | 127 g | 113 g | 85 g | 57 g | 42 g |
Tip: for the most accurate baking, weigh with a kitchen scale — a cup of the same ingredient can vary 20–30% depending on how you scoop.
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How these weights are calculated
Weights are calculated from ingredient densities (King Arthur Baking and USDA FDC and Beranbaum (The Cake Bible) and US stick standard and King Arthur / Nestlé), based on the US customary cup = 236.588 mL. Values are rounded to the nearest gram. See our methodology for how we source and verify conversion data.
Measurement method matters. Densities assume the standard way each ingredient is measured, so the numbers match how a careful baker fills a cup:
- All-Purpose Flour, Bread Flour, Cake Flour, Whole Wheat Flour, Cocoa Powder, Cornstarch — spooned & leveled.
- Brown Sugar (packed) — packed.
- Powdered Sugar — unsifted.
- Liquids and unpacked ingredients (milk, water, honey, granulated sugar, butter) — measured by volume, filled to the line.
If your number differs, check the measurement method first — a packed cup of flour and a spooned cup of flour genuinely weigh different amounts.
Frequently Asked Questions
How many grams is a cup of flour?
120 grams for 1 cup of all-purpose flour, spooned & leveled. Bread flour is a touch heavier (127 g) and cake flour a touch lighter (114 g). If you scoop straight from the bag, flour packs down and a cup can weigh 150 g or more — which is why weighing beats measuring by volume for baking.
How many grams is a cup of sugar?
200 grams for 1 cup of granulated (white) sugar. Brown sugar, packed, is heavier at 220 g because you press out the air. Powdered (confectioners') sugar is much lighter at 112 g per cup — never swap them by volume.
How many grams is a cup of butter?
227 grams for 1 cup of butter — that's 2 US sticks. Half a cup (1 stick) is about 113 g. Butter is close to water in density, so a cup weighs roughly what a cup of milk does.
Does a cup of flour weigh the same as a cup of sugar?
No. A cup is a unit of volume, not weight, so the grams depend entirely on the ingredient's density. A cup of all-purpose flour is 120 g, but a cup of granulated sugar is 200 g — sugar is about 1.7× heavier per cup. That is exactly why a reliable recipe gives weights in grams.
Is a US cup the same as a metric cup?
Not quite. This chart uses the US customary cup = 236.588 mL. A metric cup is 250 mL (about 5.7% larger) and a UK/imperial cup is 284 mL. For a metric 250 mL cup, multiply these gram values by 1.057. Most US recipe blogs mean the 236.588 mL cup.
Why should I weigh ingredients instead of using cups?
Volume measuring is inconsistent: how firmly you scoop, sift, or pack an ingredient changes the weight by 20–30%. Grams are exact and repeatable, which is why professional and metric recipes weigh everything. A $10 kitchen scale removes the guesswork — this chart lets you convert any cup recipe to grams.