There’s no single grams-to-cups number, because a cup is a volume and a gram is a weight — and ingredients have different densities. A cup of flour and a cup of sugar weigh very different amounts. To convert, divide the weight by the ingredient’s weight-per-cup.
Common ingredients (1 cup)
| Ingredient | Grams per cup |
|---|---|
| All-purpose flour | 125 g |
| Granulated sugar | 200 g |
| Packed brown sugar | 220 g |
| Powdered sugar | 120 g |
| Butter | 227 g |
| Water / milk | ~237 g |
Worked example
A recipe lists 250 g of granulated sugar. Sugar is 200 g per cup, so 250 ÷ 200 = 1.25 cups. The same 250 g of flour (125 g/cup) would be 2 cups — twice the volume for the same weight, which is exactly why ingredient-specific conversion matters.
Frequently asked questions
Is 100 g the same in cups for everything? No — 100 g of flour is about 0.8 cup; 100 g of sugar about 0.5 cup.
Why not use one conversion? Density varies; one number for all ingredients introduces big errors.
Most accurate approach? Weigh in grams and skip cups when you can.
Keep in mind these gram-per-cup figures are approximate and shift with humidity and how settled an ingredient is — another reason weighing wins for precision baking. Liquids are the easy exception, since most water-based liquids are close to 237 g per cup.