Grams to Cups Converter
100g of all-purpose flour is about 0.83 cups. The same weight of granulated sugar is about 0.51 cups, while butter is about 0.44 cups.
Choose your ingredient and cup size in the converter to find the amount you need. The examples on this page use our US Customary cup setting.
A cup measures volume, while grams measure weight. Because ingredient densities differ, each baking staple fills a different volume. Need the reverse calculation? Use our cups-to-grams converter.
How to use the grams-to-cups converter
- Choose your ingredient. Flour, sugar, butter, and other ingredients have different weights per cup.
- Enter the weight in grams. Use the amount listed in your recipe.
- Match the cup size. Select US Customary, US Legal, or Metric to match the recipe's stated measurement standard.
- Check the result and measuring method. Packed brown sugar and loosely spooned flour need different handling.
A conversion gives you an estimate based on a reference weight. If your recipe supplies grams and you have a kitchen scale, weighing the ingredient avoids the uncertainty of scooping it into a cup.
How many cups is 100 grams?
It depends on the ingredient. Use this table to compare five common baking staples.
| Ingredient | Preparation used for the reference | Reference grams per cup | 100g in cups, approximately |
|---|---|---|---|
| All-purpose flour | Fluffed, spooned, and leveled | 120g | 0.83 |
| Granulated white sugar | Granulated | 198g | 0.51 |
| Butter | Standard butter, not whipped | 227g | 0.44 |
| Brown sugar | Packed | 213g | 0.47 |
| Powdered sugar | Unsifted | 113g | 0.88 |
Looking for more ingredients? See the full 100 grams to cups comparison.
Common grams-to-cups conversions
Find a familiar recipe amount below. Each answer is calculated from the same reference weights used above and rounded to two decimal places.
| Grams | Flour: cups at 120g/cup | Granulated sugar: cups at 198g/cup | Butter: cups at 227g/cup |
|---|---|---|---|
| 50g | 0.42 | 0.25 | 0.22 |
| 100g | 0.83 | 0.51 | 0.44 |
| 150g | 1.25 | 0.76 | 0.66 |
| 200g | 1.67 | 1.01 | 0.88 |
| 250g | 2.08 | 1.26 | 1.1 |
| 300g | 2.5 | 1.52 | 1.32 |
| 500g | 4.17 | 2.53 | 2.2 |
These are decimal cups, not spoon-by-spoon measuring instructions. For example, 0.25 cup is one-quarter cup, and 1.25 cups is one and one-quarter cups. Keep the ingredient and measuring method in mind when using an approximate result.
You can also compare 50 grams across ingredients or keep our printable conversion chart nearby while you cook.
Why the ingredient changes the answer
Grams measure mass; cups measure volume. A cup tells you how much space an ingredient fills, not how much it weighs.
That is why flour and sugar need different conversions. How you fill the cup matters too: pressing a dry ingredient down can fit more of it into the same space.
Use the ingredient named in your recipe. Selecting powdered sugar when you need granulated sugar changes the reference weight and therefore the answer.
How to calculate cups from grams
Cups = grams ÷ grams per cup
For 250g of flour using a 120g-per-cup reference:
For the reverse calculation:
Grams = cups × grams per cup
The reference weight must match the ingredient and cup standard. Our ingredient weight table and conversion methodology explain the references and calculations in more detail.
Which cup size should you use?
Check the recipe or your measuring cup rather than assuming every cup has the same volume.
| Converter setting | Volume | What it means |
|---|---|---|
| US Customary | About 236.6 mL | The default setting used for this page's examples |
| US Legal | 240 mL | The cup definition used for US nutrition labeling |
| Metric | 250 mL | Use when the recipe specifies a 250mL cup |
NIST lists the US cup volume, while the FDA defines the nutrition-labeling cup as 240mL. The 250mL metric cup is also shown in Taste's measurement chart.
A larger cup holds more of the same ingredient. That means a fixed weight fills fewer metric cups than US Customary cups. Read our cup-size guide if you are working between measurement standards.
Measuring tips before you start
- For flour, fluff it, spoon it into the cup, then level the top. Avoid pressing it down. This follows King Arthur's flour-measuring method. Our step-by-step flour guide explains the process.
- For brown sugar, check whether the recipe says packed. The brown-sugar reference in our table is for packed sugar; a loosely filled cup is a different measurement.
- For liquids, use a measuring vessel with clear volume markings. Dry and liquid measuring cups serve different practical purposes; King Arthur explains when to use each.
- If the recipe gives its own weight equivalent, follow that reference. A general converter cannot tell how the recipe developer originally filled a cup.
Explore Ingredient-Specific Conversion Guides
Each ingredient behaves differently in a measuring cup. Explore our dedicated, source-backed ingredient guides for detailed measuring techniques, packed vs. loose densities, and recipe charts:
Questions about converting grams to cups
How many grams are in one cup?
There is no single answer for every ingredient. Under the reference values above, a cup of all-purpose flour is 120g, granulated sugar is 198g, and standard butter is about 227g. For another ingredient, check the converter or reference table.
Why does another converter give a different answer?
It may use a different reference weight, preparation method, cup size, or rounding rule. Compare those assumptions first. A small difference does not necessarily mean a calculation is wrong, but the source and measuring method should be clear.
Can I use an ordinary drinking cup?
Only if you know its volume. A mug or drinking glass may hold more or less than the measuring cup assumed by the recipe. Use a marked measuring cup or weigh the ingredient instead.
Can I use one ingredient's conversion to substitute another?
No. Matching the weight or volume does not establish a suitable recipe substitution. Use this converter for measurement, and follow recipe-specific guidance when changing ingredients.