How to use the grams to cups converter
- Select whether you want to convert grams to cups or cups to grams.
- Enter the amount you wish to convert.
- Choose your ingredient from the list, since each has a different density per US cup.
- Read the approximate result instantly as you type.
How the gram to cup conversion works
Converting between weight and volume requires knowing how much one US cup of the ingredient weighs. A US customary cup is exactly 236.5882365 milliliters. Because ingredients have different densities, one cup of flour weighs far less than one cup of sugar.
The formula for converting grams to cups is:
cups = grams / grams_per_cup
For example, 250 grams of all-purpose flour at 120 grams per cup gives 250 / 120 = 2.083 cups. To go from cups to grams, multiply instead: grams = cups * grams_per_cup. So 2 cups of granulated sugar at 198 grams per cup equals 396 grams.
Common ingredient weights per US cup
The table below lists the standard weight in grams for one level US cup of common baking ingredients. Flour, sugar, butter, rice, oats, cocoa and honey follow the King Arthur Baking ingredient weight chart (honey is 21 g per tablespoon times 16); water, milk and vegetable oil follow USDA FoodData Central cup weights. Other sources, such as USDA entries for flour or rice, differ by a few grams. These are approximate values for foods, because scooping technique, humidity and packing change the actual weight.
| Ingredient | Grams per cup |
|---|---|
| All-purpose flour | 120 |
| Bread flour | 120 |
| Cake flour | 120 |
| Granulated sugar | 198 |
| Brown sugar (packed) | 213 |
| Powdered sugar | 113 |
| Butter | 227 |
| White rice (uncooked) | 198 |
| Rolled oats | 113 |
| Cocoa powder | 84 |
| Honey | 336 |
| Milk | 244 |
| Vegetable oil | 218 |
| Water | 236.6 |
Why weighing ingredients matters
Professional bakers weigh dry ingredients rather than measuring by volume because a cup of flour can vary by 20 percent or more depending on whether it was spooned, scooped or sifted. Using a kitchen scale eliminates that variability. When a recipe provides only volume measurements, this grams to cups converter helps you translate them into weights so you can use your scale.
For liquids like water, milk or oil, volume measurements are generally reliable because liquids settle consistently. But for dry goods such as flour, sugar, cocoa and oats, weight is always more accurate.
US cups versus metric cups
This tool uses the US customary cup, which is defined as exactly 236.5882365 milliliters. Some countries use a metric cup of 250 milliliters, and Australia uses a slightly different standard. If your recipe comes from outside the United States, check which cup size the author intended before converting. You may also need to convert between other units: see the tablespoons to cups or quarts to cups tools for related US volume conversions.
Practical tips for accurate measuring
If you must measure flour by volume rather than weight, use the spoon-and-level method: fluff the flour in its container, spoon it gently into the measuring cup until heaped, then level it off with a straight edge. Never tap or shake the cup, as that compacts the flour and adds extra grams per cup. Brown sugar is the exception: recipes usually call for it firmly packed, which increases its density to about 213 grams per cup.
When converting large batches, small rounding differences compound. For instance, if you round 120 grams of flour to 125 grams per cup, a ten-cup batch will be off by 50 grams. Use the exact figures in the reference table above for the best results.
Worked examples
| Example | Input | Result |
|---|---|---|
| 250 g all-purpose flour | Conversion direction: g2c; Amount: 250; Ingredient: ap-flour | Cups: 2.083; Grams entered: 250; Grams per cup: 120 |
| 2 cups granulated sugar | Conversion direction: c2g; Amount: 2; Ingredient: sugar | Grams: 396; Cups entered: 2; Grams per cup: 198 |
| 500 g white rice | Conversion direction: g2c; Amount: 500; Ingredient: rice | Cups: 2.525; Grams entered: 500; Grams per cup: 198 |
| 1.5 cups butter | Conversion direction: c2g; Amount: 1.5; Ingredient: butter | Grams: 340.5; Cups entered: 1.5; Grams per cup: 227 |
FAQ
How many grams are in a cup?
It depends entirely on the ingredient. One US cup of water weighs about 236.6 grams, while one cup of all-purpose flour weighs 120 grams and one cup of granulated sugar weighs 198 grams.
Is 250 grams equal to 1 cup?
Only for ingredients that weigh 250 grams per cup. Water is close at 236.6 grams per cup, but most dry ingredients differ significantly. Always check the specific ingredient density.
Can I use this converter for any ingredient?
The tool includes 14 common baking and cooking ingredients. If yours is not listed, choose the closest match or look up its grams-per-cup value and divide manually.
Does sifting flour change the cup weight?
Yes. Sifted flour is lighter per cup because air separates the particles. The 120 grams per cup figure assumes the standard spoon-and-level method without pre-sifting.
Are these US cups or metric cups?
This converter uses US customary cups, which equal 236.5882365 milliliters. Metric cups used in some countries equal 250 milliliters.
Why does brown sugar weigh more than white sugar per cup?
Brown sugar is typically packed firmly into the measuring cup, eliminating air pockets. It also contains molasses, which adds moisture and density, bringing it to about 213 grams per cup compared to 198 grams for granulated white sugar.