Cups to Grams Converter
Recipes from the US, the UK, and Australia often list ingredients in cups, but most kitchen scales weigh in grams. Use this page to convert cups to grams for any common baking ingredient — pick the ingredient, enter the cup amount, and read off the weight in grams.
Common Cups to Grams Conversions
A quick-reference table for the most-used baking ingredients. Values are rounded to the nearest gram.
| Cups | Plain Flour | Sugar | Brown Sugar | Butter | Rolled Oats |
|---|---|---|---|---|---|
| ¼ cup | 31 g | 50 g | 40 g | 57 g | 23 g |
| ⅓ cup | 42 g | 67 g | 53 g | 76 g | 30 g |
| ½ cup | 63 g | 101 g | 80 g | 114 g | 45 g |
| ⅔ cup | 83 g | 134 g | 107 g | 151 g | 60 g |
| ¾ cup | 94 g | 151 g | 120 g | 170 g | 68 g |
| 1 cup | 125 g | 201 g | 160 g | 227 g | 90 g |
| 2 cups | 250 g | 402 g | 320 g | 454 g | 180 g |
Why Convert Cups to Grams?
Weighing ingredients is more accurate than measuring by volume. A cup of flour can weigh anywhere from 110 to 150 grams depending on how tightly it's packed, so two bakers following the same cup-based recipe can end up with very different results. Switching to grams removes that variability — your cake comes out the same every time.
For ingredient-specific conversions and tips, open the dedicated page for plain flour, sugar, butter, or brown sugar.
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Frequently Asked Questions
- How many grams is 1 cup?
- It depends on the ingredient. 1 cup of plain flour is 125 grams, 1 cup of granulated sugar is 201 grams, and 1 cup of butter is 227 grams. Use the converter above for any ingredient.
- Why does the cup-to-gram conversion differ between ingredients?
- A cup is a measure of volume; a gram is a measure of weight. Because ingredients have different densities, the same volume can weigh very different amounts — fluffy flour weighs much less per cup than dense sugar or butter.
- Are US cups and metric cups the same?
- Not quite. A metric cup is 250 ml; a US cup is 240 ml — about 4% smaller. This site uses the metric cup as the default. For US cups, switch the unit in the converter above.
- How many grams is half a cup of flour?
- Half a cup of plain flour is approximately 63 grams. Open flour converter
- How many grams is half a cup of sugar?
- Half a cup of granulated sugar is approximately 100 grams. Open sugar converter