Grams to Cups
Cups use the selected ingredient’s reference portion. Packing and cup size can change the weight. For precise baking, use a scale or your recipe’s grams-per-cup value.
Grams to cups formula
Cups = grams ÷ grams per cup. To convert in the other direction, use grams = cups × grams per cup. Grams measure mass and cups measure volume, so every conversion needs an ingredient-specific reference weight.
For example, 250 g of all-purpose flour divided by 125 g per cup gives 2 cups. The same 250 g of granulated sugar divided by 200 g per cup gives 1.25 cups. A cup of a different food can weigh more or less even though the container is the same size.
Ingredient conversion chart
Each row uses a named USDA household portion. Packing and sifting labels are part of the reference. The source links open the relevant PDF page; the NDB number identifies the food record.
| Ingredient | 1 cup | 100 g in cups | USDA record |
|---|---|---|---|
| All-purpose flour (white, unenriched) | 125 g | ≈ 0.8 | 20481, p. 2 |
| Bread flour (white, enriched) | 137 g | ≈ 0.7299270073 | 20083, p. 2 |
| Whole-wheat flour | 120 g | ≈ 0.8333333333 | 20080, p. 487 |
| White cornmeal (whole-grain) | 122 g | ≈ 0.8196721311 | 20320, p. 2 |
| White long-grain rice (raw, unenriched) | 185 g | ≈ 0.5405405405 | 20444, p. 1 |
| Butter (salted) | 227 g | ≈ 0.4405286344 | 01001, p. 12 |
| Honey | 339 g | ≈ 0.2949852507 | 19296, p. 482 |
| Granulated sugar | 200 g | ≈ 0.5 | 19335, p. 737 |
| Brown sugar (packed) | 220 g | ≈ 0.4545454545 | 19334, p. 734 |
| Brown sugar (unpacked) | 145 g | ≈ 0.6896551724 | 19334, p. 734 |
| Powdered sugar (unsifted) | 120 g | ≈ 0.8333333333 | 19336, p. 742 |
| Powdered sugar (sifted) | 100 g | ≈ 1 | 19336, p. 742 |
Packed sugar and sifted sugar are different measures
The USDA brown sugar record lists 220 g for a packed cup and 145 g for an unpacked cup. Its powdered sugar record lists 120 g for an unsifted cup and 100 g for a sifted cup. Select the state that matches your recipe instead of treating those values as interchangeable.
The all-purpose flour record used here lists 125 g per cup without specifying a packing method. It is not labeled as a spooned-and-leveled or sifted measure. Use the weight specified by your recipe when it differs.
Use a custom recipe or package value
Select Custom grams per cup and enter the weight for one cup of that ingredient. If a package states that 1/4 cup weighs 30 g, multiply 30 by 4 to get 120 g per cup. With that custom value, 180 g converts to 1.5 cups. Use the same product and measuring method for the factor and the amount you are converting.
Reference portions, cup size, and precision
These are reference estimates, not universal densities. The cited household measures do not establish that every cup equals 236.5882 mL or 240 mL. The converter uses the grams-per-cup value directly; it does not automatically translate between US, metric, and Imperial cups. The separate mL-to-cups tool handles named volume standards.
Enter an amount from 0 to 1,000,000 using plain decimals with up to six places, simple fractions, or mixed numbers such as 1 1/2. Custom grams per cup must be a positive decimal no greater than 1,000,000. Commas, scientific notation, and negative values are not accepted. Calculations retain unrounded values and display up to ten significant digits; displayed digits do not make the underlying portion weight more precise.
For precise baking, weigh ingredients directly. A scoop can contain more or less food as it settles or packs. This page uses only the household weight and food descriptor from the sources, without estimating calories or nutritional content. Reference records date from 2015 and 2019; the cited portions were checked on September 22, 2026.
Frequently asked questions
How do I convert grams to cups?
Divide the grams by the grams in one cup of your ingredient. Using the USDA reference for all-purpose flour, 250 g ÷ 125 g per cup = 2 cups. Select the ingredient before converting.
How many grams are in a cup?
It depends on the ingredient and how it is measured. The references used here list one cup of all-purpose flour as 125 g, granulated sugar as 200 g, and salted butter as 227 g. There is no single grams-per-cup value for every food.
How much is 100 grams in cups?
Using this tool’s reference portions, 100 g of all-purpose flour is 0.8 cup, while 100 g of granulated sugar is 0.5 cup. Choose your ingredient or enter a custom grams-per-cup value.
Can I convert cups to grams or enter fractions?
Yes. Select Cups to grams, then enter a decimal or a fraction such as 1/2 or 1 1/2. Changing direction clears the amount so grams are not reinterpreted as cups. One and a half cups of granulated sugar at 200 g per cup gives 300 g.
Why do flour and sugar conversions differ between websites?
Reference portions and measuring methods can differ. Flour can settle, brown sugar can be packed, and powdered sugar can be sifted. This tool shows the reference weight it uses and keeps documented packing and sifting conditions separate. For a recipe that specifies its own weight per cup, choose Custom grams per cup.
Does this convert between US, metric, and Imperial cups?
No. The presets use the household cup portions listed in the cited USDA records. Those rows do not establish a universal cup volume in milliliters. This tool does not rescale them to a different cup standard. Use a grams-per-cup value measured for your own cup and ingredient when needed.