About cupstograms
cupstograms.org is a free, independent kitchen converter. It does one job: turn cups into grams (and back) so your baking comes out the same every time.
Where the numbers come from
- Dry ingredients (flour, sugar, cocoa, oats, nuts) use the King Arthur Baking ingredient weight chart, a standard reference for home bakers in the US.
- Liquids and dairy (milk, cream, oil, yogurt) use USDA FoodData Central. King Arthur rounds most liquids to 227 g per cup, which is about 4% light for milk and water.
- Water is calculated: 1 US cup = 236.588 ml × 1 g/ml ≈ 237 g.
How we measure a cup
- A US cup is 236.588 ml. A metric cup is 250 ml. The metric option scales every weight by 250 ÷ 236.588.
- Dry ingredients are spooned and leveled, not scooped. Brown sugar is packed.
- Cup results are rounded to the nearest ⅛ or ⅓ cup, because those are the cups you own. The exact decimal is always shown too.
Ingredient list
Grams per US cup, with source. Last checked November 2, 2026.
| Ingredient | g / cup | Source |
|---|---|---|
| All-purpose flour | 120 | King Arthur |
| Bread flour | 120 | King Arthur |
| Cake flour | 120 | King Arthur |
| Whole wheat flour | 113 | King Arthur |
| Self-rising flour | 113 | King Arthur |
| Almond flour | 96 | King Arthur |
| Cornstarch | 112 | King Arthur |
| Granulated sugar | 198 | King Arthur |
| Brown sugar (packed) | 213 | King Arthur |
| Powdered sugar | 113 | King Arthur |
| Honey | 336 | King Arthur |
| Maple syrup | 312 | King Arthur |
| Molasses | 340 | King Arthur |
| Corn syrup | 312 | King Arthur |
| Butter | 227 | King Arthur |
| Vegetable oil | 218 | USDA |
| Olive oil | 216 | USDA |
| Coconut oil | 227 | King Arthur |
| Water | 237 | Calculated |
| Milk | 244 | USDA |
| Heavy cream | 238 | USDA |
| Buttermilk | 245 | USDA |
| Sour cream | 230 | USDA |
| Plain yogurt | 245 | USDA |
| Cream cheese | 227 | King Arthur |
| Cocoa powder | 84 | King Arthur |
| Rolled oats | 89 | King Arthur |
| Chocolate chips | 170 | King Arthur |
| White rice (uncooked) | 198 | King Arthur |
| Peanut butter | 270 | King Arthur |
| Walnuts (chopped) | 113 | King Arthur |
| Raisins | 149 | King Arthur |
| Shredded coconut (sweetened) | 85 | King Arthur |
| Table salt | 288 | King Arthur |
Spotted a wrong number?
Different brands and climates give slightly different weights. If a number looks off for your ingredient, let us know and we'll check it against our sources.