CalcPairsCups to Grams Converter — by Ingredient
A cup is a volume, not a weight — so the answer depends on what is in it: 2 cups of all-purpose flour is 240 g, while 2 cups of sugar would be 400 g and 2 cups of butter 454 g. Pick your ingredient above and the converter uses its real density.
Type in either box — the other side answers instantly. Everything is worked out in your browser; your numbers are never uploaded anywhere.
How this conversion works
This is the page Google's one-line answer cannot give you, because the honest answer is 'it depends'. A cup measures space; a gram measures mass; the bridge between them is how densely the ingredient packs. Spooned-and-levelled flour is mostly air — 120 g to the cup. Sugar packs tighter at 200 g. Butter barely packs air at all: 227 g.
Choose the ingredient, then type either side: cups become grams for the scale, grams become cups for the measuring jug. How you fill the cup matters too — flour scooped straight from the bag can run 20% heavy versus spooned and levelled, which is why serious bakers weigh. The densities here assume the standard spoon-and-level method for dry goods.
The exact formula
grams = cups × grams-per-cup for that ingredient
There is no single cups-to-grams constant — there is one per ingredient. This page uses the standard reference densities in the chart below (King Arthur Baking's widely used figures): flour 120, granulated sugar 200, butter 227 g per US cup.
Ingredient density chart
| Ingredient | Grams per cup | Grams per tbsp |
|---|---|---|
| All-purpose flour | 120 | 7.5 |
| Granulated sugar | 200 | 12.5 |
| Brown sugar (packed) | 220 | 13.75 |
| Powdered (icing) sugar | 120 | 7.5 |
| Butter | 227 | 14.1875 |
| Cocoa powder | 100 | 6.25 |
| Honey | 340 | 21.25 |
| Rolled oats | 90 | 5.625 |
| Rice (uncooked) | 185 | 11.5625 |
| Milk | 245 | 15.3125 |
| Water | 236 | 14.75 |
| Table salt | 288 | 18 |
| Baking powder | 221 | 13.8125 |
Reference densities (King Arthur Baking chart), spooned and levelled for dry goods. The converter above uses exactly these figures.
Cups (US) to Grams conversion table
| Cups (US) (cups) | Grams (g) |
|---|---|
| 0.25 | 30 |
| 0.5 | 60 |
| 0.75 | 90 |
| 1 | 120 |
| 1.5 | 180 |
| 2 | 240 |
| 3 | 360 |
| 4 | 480 |
| 5 | 600 |
at the default ingredient — all-purpose flour, 120 g per cup. Change the ingredient above and use the density chart for the others.
Frequently asked questions
How many grams are in a cup of flour?
120 g for all-purpose flour, spooned and levelled. Scooping the cup through the bag packs it and can push the same cup toward 140 g — the single biggest error in home baking.
Why do different sites give different grams for a cup?
Because densities are conventions, not definitions: each reference (King Arthur, the USDA, various publishers) measured slightly different packing. They agree within a few percent; this page uses King Arthur's chart throughout so its numbers are at least consistent with each other.
How many cups is 250 g of sugar?
1.25 cups — 250 ÷ 200 g per cup. Type it into the converter with sugar selected to check.