⚖️ Grams to Cups Converter
By ToolNimba Editorial Team · Updated 2026-06-20
240 g of water is 1 cup
Using a density of 240 grams per US cup.
Cup values use the US customary cup (about 236.6 ml). Densities are typical kitchen averages, so weigh on a scale for precise baking.
Grams and cups measure different things, weight versus volume, so you cannot convert between them without knowing the ingredient. This grams to cups converter uses the typical density of each ingredient to give an accurate answer, and it works in both directions. Pick an ingredient, type a grams or cups value, and read the result instantly.
What is the Grams to Cups Converter?
A gram is a unit of weight while a cup is a unit of volume, and the only thing that links them is how heavy a given ingredient is for the space it fills. This is called density, and it is the reason there is no single grams to cups number that works for everything. One cup of water weighs about 240 grams, but one cup of all-purpose flour weighs only about 125 grams because flour is light and full of air, while one cup of honey weighs roughly 340 grams because it is dense and sticky. To convert correctly you must tell the tool which ingredient you are measuring.
The math itself is simple once you have a density. Every ingredient in this converter has a "grams per cup" figure, and the conversion is just division or multiplication. To go from grams to cups you divide the weight by the grams per cup. To go from cups to grams you multiply the number of cups by the grams per cup. For example, 250 grams of granulated sugar at 200 grams per cup is 250 divided by 200, which is 1.25 cups. Going the other way, 2 cups of flour at 125 grams per cup is 2 times 125, which is 250 grams.
The densities used here are widely accepted kitchen averages, but real ingredients vary. Flour that is scooped and packed weighs more per cup than flour that is spooned in and leveled, and brown sugar weighs more when pressed firmly into the cup. Humidity, brand, and how finely something is ground all shift the number a little. That is why a volume to weight conversion is always an estimate, accurate enough for everyday cooking but not as precise as a kitchen scale.
This is also why professional bakers prefer grams. Weighing removes the guesswork of how packed a cup is, makes recipes repeatable, and scales cleanly when you double or halve a batch. If you are following a recipe written in cups and want consistent results, converting to grams once and then weighing every time is the most reliable approach. This tool is built to make that first conversion fast and to handle the reverse whenever a recipe gives you weights but your only tools are measuring cups.
When to use it
- Following a European recipe written in grams when your kitchen only has US measuring cups.
- Converting a recipe from cups to grams so you can weigh ingredients for more consistent baking.
- Working out how many cups a 500 gram bag of flour or sugar will give you.
- Scaling a recipe up or down and needing accurate amounts for each ingredient by weight.
How to use the Grams to Cups Converter
- Choose the ingredient you are measuring from the dropdown, since density differs for each one.
- Select the direction you want, grams to cups or cups to grams.
- Type the amount into the input box that appears.
- Read the converted result instantly, along with the density used.
Formula & method
Worked examples
A recipe lists 300 grams of all-purpose flour, but you only have measuring cups.
- All-purpose flour has a density of about 125 grams per US cup.
- Set the direction to grams to cups.
- Divide the weight by the density: 300 / 125 = 2.4 cups.
- Measure 2 cups plus a little under half a cup more.
Result: 300 grams of all-purpose flour is about 2.4 US cups.
You want to weigh out 1.5 cups of granulated sugar instead of measuring by volume.
- Granulated sugar has a density of about 200 grams per US cup.
- Set the direction to cups to grams.
- Multiply cups by the density: 1.5 x 200 = 300 grams.
- Weigh 300 grams of sugar on a kitchen scale.
Result: 1.5 cups of granulated sugar is about 300 grams.
Grams per US cup for common ingredients
| Ingredient | Grams per cup | 1 cup | 1/2 cup |
|---|---|---|---|
| Water | 240 | 240 g | 120 g |
| Milk | 240 | 240 g | 120 g |
| All-purpose flour | 125 | 125 g | 63 g |
| Granulated sugar | 200 | 200 g | 100 g |
| Brown sugar, packed | 220 | 220 g | 110 g |
| Powdered sugar | 120 | 120 g | 60 g |
| Butter | 227 | 227 g | 113 g |
| Vegetable oil | 218 | 218 g | 109 g |
| Honey | 340 | 340 g | 170 g |
| White rice, uncooked | 185 | 185 g | 93 g |
| Rolled oats | 90 | 90 g | 45 g |
| Cocoa powder | 125 | 125 g | 63 g |
How many cups in common grams of flour and sugar
| Weight | All-purpose flour | Granulated sugar |
|---|---|---|
| 100 g | 0.8 cup | 0.5 cup |
| 200 g | 1.6 cups | 1 cup |
| 250 g | 2 cups | 1.25 cups |
| 500 g | 4 cups | 2.5 cups |
| 1000 g | 8 cups | 5 cups |
Common mistakes to avoid
- Using one conversion for every ingredient. There is no universal grams to cups number. A cup of flour is about 125 grams but a cup of water is 240 grams and a cup of honey is 340 grams. Always pick the correct ingredient so the density matches.
- Ignoring how packed the cup is. Scooping flour straight from the bag packs it down and can add 20 percent more weight than spooning and leveling. Brown sugar is usually measured packed. The density values here assume the standard method, so your real result can differ.
- Mixing up cup sizes. This tool uses the US customary cup of about 236.6 ml. A metric cup is 250 ml and an imperial cup is about 284 ml, so weights based on those cups will be a little higher.
- Confusing grams with milliliters. Grams measure weight and milliliters measure volume. They are only equal for water. For oil, syrup or flour, grams and milliliters give different numbers, so do not treat them as interchangeable.
Glossary
- Gram (g)
- A metric unit of weight. One thousand grams make a kilogram. Weight does not depend on how loosely an ingredient is packed.
- Cup
- A unit of volume used in recipes. This tool uses the US customary cup, which is about 236.6 ml or 16 tablespoons.
- Density
- How much an ingredient weighs for a given volume, expressed here as grams per cup. It is the value that links weight and volume.
- Grams per cup
- The weight of one US cup of a specific ingredient. Dividing a weight by this number gives the number of cups.
- Packed measure
- Pressing an ingredient firmly into the cup, common for brown sugar, which increases its weight per cup.
- Volume to weight conversion
- Translating a measure of space, like cups, into a measure of mass, like grams, using an ingredient density.
Frequently asked questions
How many grams are in a cup?
It depends on the ingredient because grams measure weight and cups measure volume. One US cup of water is about 240 grams, a cup of all-purpose flour is about 125 grams, a cup of granulated sugar is about 200 grams, and a cup of honey is about 340 grams. Select your ingredient above for the exact figure.
How many grams of flour are in a cup?
One US cup of all-purpose flour weighs about 125 grams when spooned in and leveled. If you scoop straight from the bag and pack it down, the same cup can weigh closer to 150 grams, which is why weighing is more reliable than measuring by volume.
How many grams of sugar are in a cup?
One US cup of granulated sugar weighs about 200 grams. Brown sugar measured packed is heavier at about 220 grams per cup, and powdered (icing) sugar is lighter at about 120 grams per cup.
Why can I not use one grams to cups number for everything?
Because different ingredients have different densities. A cup of a light, airy ingredient like flour weighs far less than a cup of a dense one like honey. The only way to convert correctly is to use the specific density of the ingredient you are measuring, which this tool does.
Is this for US cups or metric cups?
The conversions use the US customary cup, which is about 236.6 ml. A metric cup is 250 ml and an imperial cup is about 284 ml, so if your recipe uses those, the gram weights would be slightly higher than the values shown here.
Are grams and milliliters the same thing?
Only for water. Grams measure weight and milliliters measure volume, and they match exactly only when an ingredient has a density of 1 gram per milliliter, like water. For oil, honey, flour or sugar they are different, so always convert using weight rather than assuming they are equal.