How many grams are in 1 cup of flour?
One US cup of all-purpose flour weighs about 120 grams (4.2 oz) when spooned into the cup and levelled. Scooped straight from the bag it can reach 130–150 g, which is why recipes disagree.
Cups to grams, without the guesswork
Weight is what your recipe really means. Enter an amount, pick your ingredient and cup standard, and see exactly how we convert it — with the assumptions shown.
Ingredient
120 grams
US cup · all-purpose flour · spoon and level
More precise value: 120 grams
- Cup standard
- US cup · 240 ml
- Ingredient
- all-purpose flour
- Method
- spoon and level
- Density
- 0.5 g/ml
- Sources
- King Arthur · USDA FDC
- Reviewed
- 2026-08
Paste from anywhere — we convert every cup, stick and spoon we recognize and leave the rest untouched.
Converted recipe
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Common conversions
| Cups | Flour | Milk | Butter | Sugar | Brown sugar | Icing sugar | Honey | Cocoa |
|---|---|---|---|---|---|---|---|---|
| ⅛ | 15 g | 31 g | 28 g | 25 g | 28 g | 15 g | 42 g | 11 g |
| ¼ | 30 g | 61 g | 57 g | 50 g | 55 g | 30 g | 85 g | 22 g |
| ⅓ | 40 g | 81 g | 76 g | 67 g | 73 g | 40 g | 113 g | 29 g |
| ½ | 60 g | 122 g | 114 g | 100 g | 110 g | 60 g | 170 g | 43 g |
| ⅔ | 80 g | 163 g | 151 g | 133 g | 147 g | 80 g | 226 g | 57 g |
| ¾ | 90 g | 183 g | 170 g | 150 g | 165 g | 90 g | 254 g | 65 g |
| 1 | 120 g | 244 g | 227 g | 200 g | 220 g | 120 g | 339 g | 86 g |
| 1½ | 180 g | 366 g | 341 g | 300 g | 330 g | 180 g | 509 g | 129 g |
| 2 | 240 g | 488 g | 454 g | 400 g | 440 g | 240 g | 678 g | 172 g |
US cup · 240 ml · Reviewed: 2026-08
Quick answers
How many grams are in 1 cup of milk?
One US cup of whole milk weighs about 244 grams (8.6 oz). Milk is close to water but slightly denser, so a cup weighs a little more than 240 g.
How many grams are in 1 cup of butter?
One US cup of unsalted butter weighs about 227 grams (8 oz). One US cup of butter is two standard sticks, so 227 g is an exact, reliable figure.
What is the difference between US, metric and imperial cups?
A US customary cup is 236.588 ml, while a metric cup is 250 ml — about 5.7% larger. An imperial (UK) cup is 284.131 ml. The same ingredient therefore weighs more per metric or imperial cup than per US cup.
Why do cup-to-gram results differ?
A cup measures volume, not weight, so the answer depends on the ingredient and how it is measured. A cup of flour can weigh 110–150 g depending on whether it is scooped, spooned or sifted. We assume spoon-and-level — the method most modern recipes use — so treat every cup conversion as a close estimate, not an exact truth.
Sources: USDA FoodData Central · King Arthur ingredient weight chart. Reviewed 2026-08.
Ingredient guides
Verified gram weights, measuring technique and conversion tables for every ingredient we cover.
- Flour · 120 g
- Milk · 244 g
- Butter · 227 g
- Sugar · 200 g
- Brown sugar · 220 g
- Icing sugar · 120 g
- Honey · 339 g
- Oats · 89 g
- Cocoa · 86 g
- Rice · 185 g
- Water · 240 g
- Whole-wheat flour · 113 g
- Bread flour · 120 g
- Almond flour · 96 g
- Cornstarch · 112 g
- Cornmeal · 138 g
- Maple syrup · 315 g
- Vegetable oil · 218 g
- Olive oil · 216 g
- Peanut butter · 258 g
- Yogurt · 245 g
- Heavy cream · 238 g
- Sour cream · 230 g
- Cream cheese · 232 g
- Chocolate chips · 168 g
- Walnuts · 117 g