Cups to grams converter
Working from an American recipe with a kitchen scale? Enter the number of cups and get the weight in grams for your ingredient.
Enter an amount to see the conversion.
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Based on g per cup. Approximate — density varies with packing and brand.
Quick pick
What one cup weighs
A US cup holds 236.6 ml. What that weighs depends entirely on what you put in it:
| Ingredient | 1 cup weighs |
|---|---|
| All-Purpose Flour | 120 g |
| Granulated Sugar | 200 g |
| Butter | 227 g |
| Water | 236 g |
| Brown Sugar | 213 g |
| White Rice | 185 g |
| Honey | 340 g |
| Powdered Sugar | 120 g |
| Rolled Oats | 80 g |
| Whole Milk | 244 g |
| Bread Flour | 127 g |
| Vegetable Oil | 218 g |
Cup fractions in grams
Recipes rarely call for a round cup. Here is every fraction you are likely to meet, against the four ingredients that account for most of the baking cupboard.
| Cups | All-Purpose Flour | Granulated Sugar | Butter | Brown Sugar |
|---|---|---|---|---|
| 1/4 cup | 30 g | 50 g | 57 g | 53 g |
| 1/3 cup | 40 g | 67 g | 76 g | 71 g |
| 1/2 cup | 60 g | 100 g | 114 g | 107 g |
| 2/3 cup | 80 g | 133 g | 151 g | 142 g |
| 3/4 cup | 90 g | 150 g | 170 g | 160 g |
| 1 cup | 120 g | 200 g | 227 g | 213 g |
| 1 1/2 cups | 180 g | 300 g | 341 g | 320 g |
| 2 cups | 240 g | 400 g | 454 g | 426 g |
Butter is the one figure here that never moves: a US cup is two sticks, which is 8 ounces by definition rather than by measurement.
How to convert cups to grams
Multiply the number of cups by what one cup of that ingredient weighs. That is the whole method:
grams = cups × grams per cup
- Look up what one cup of your ingredient weighs — the table above, or its own page.
- Multiply by the number of cups. Two thirds of a cup is 0.67 for this purpose.
- Round to the nearest gram. Nothing in a domestic kitchen is more precise than that.
The result is more reliable than the cup measurement that produced it, which is the point: once a recipe is in grams, it stops depending on how firmly anyone packed a cup.
When your cup does not match ours
Our figures assume a US cup of 236.6 ml, filled the way most published recipes intend — spooned in and levelled off, not scooped and compacted. If a recipe was written by someone who dips the cup into the flour bag, their cup held more than ours and the weight you calculate will run a little light. For flour that gap is around 20 grams a cup, which is roughly a sixth of the total.
A metric cup is 250 ml and an imperial cup about 284 ml, so a British or Australian recipe needs a little more than these numbers suggest. Every ingredient page lists the figures per technique so you can pick the one that matches how the recipe was written.
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