Convert any number of cups to grams for flour, sugar, butter, oil, milk, honey and 17+ baking ingredients. USDA and King Arthur densities. Free and instant.
Want to change something?Edit any field and calculate again.
Instant resultIt recalculates in your browser, no page reload.
Fast and transparent
How to use this calculator
Follow this tool’s steps, then review its formula, assumptions, and limits below.
Step by step
01
Enter how many cupsType a number of cups (whole or decimal). 1/2 = 0.5, 1/4 = 0.25, 3/4 = 0.75.
02
Pick your ingredientSelect from the dropdown — the density changes dramatically between flour, sugar, butter, honey, etc.
03
Read the weightThe primary result is the weight in grams. You also get ounces (US) and tablespoons for cross-reference.
How many grams in a cup? It depends on the ingredient: a cup of all-purpose flour weighs 120 g, butter 227 g, and honey 340 g. This converter uses reference densities from USDA FoodData Central and King Arthur Baking Company across 17 common baking ingredients, and the NIST-defined US legal cup of 240 mL — so your recipes scale correctly between American volume measures and metric weights.
When to use this calculator
You're following a US recipe that uses cups and your kitchen only has a gram scale.
You want consistent results: baking is chemistry, and cups-by-eye vary ±20%.
You're scaling a recipe up or down and need precise quantities.
You're translating an American cookbook for metric kitchens.
You're a pastry student learning why 1 cup of flour ≠ 1 cup of sugar in weight.
Cups to Grams: Reference Weights per 1 US Cup (240 mL)
Ingredient
1 cup (grams)
Density notes
Rolled oats
85 g
Low-density, fluffy
Cocoa powder
85 g
Low-density, fluffy
Whole wheat flour
113 g
Slightly denser than white flour
Nuts (chopped)
115 g
Varies by nut size
All-purpose flour
120 g
Spoon-and-level method
Chocolate chips
170 g
Dense chunks
Granulated sugar
200 g
Dense crystals
Brown sugar (packed)
213 g
Packed = more mass
Vegetable oil
218 g
Liquid
Butter
227 g
Dense solid fat
Milk
245 g
Denser than water
Honey
340 g
~1.4× water density
Fuente: USDA FoodData Central & King Arthur Baking Company — Ingredient Weight Chart. US cup = 240 mL (NIST Handbook 44). All-purpose flour measured by spoon-and-level; direct scooping can yield 140–160 g/cup.
How it works
Why 1 cup ≠ 1 cup (by weight)
A cup is a volume measurement — 240 ml in the US standard. But different ingredients have different densities (mass per unit volume), so the same cup holds different weights:
Why US vs metric cups matter
US cup = 240 ml (legal definition: 236.588 ml, rounded to 240 in recipes).
UK / Commonwealth cup = 250 ml.
Japanese cup = 200 ml.
Metric cup (Australia) = 250 ml.
This calculator uses the US cup (240 ml). If your recipe specifies a metric cup, multiply results by 1.042.
How to measure cups correctly ("spoon and level")
For flour especially, how you fill the cup matters a lot. The reference 120 g/cup assumes the spoon-and-level method:
1. Fluff the flour with a spoon in the container (breaks up compaction). 2. Spoon flour into the measuring cup until it overflows. 3. Level off with a flat edge (knife back, ruler, etc.).
If you scoop directly with the measuring cup (pressing into the flour), you can pack 140–160 g/cup — up to 30% more flour than the recipe assumes. That's the #1 reason home baking fails.
Why bakers use grams
Professional and serious home bakers weigh ingredients instead of measuring volumes. Reasons:
Consistency: 120 g is 120 g every time. 1 cup scooped varies ±20%.
Accuracy: hydration ratios in bread (e.g. 65%) are weight-based, not volume.
Fewer dishes: one bowl on a scale vs. multiple measuring cups.
Scaling: halving or doubling is trivial with weights.
2 cups of all-purpose flour = 240 g — about 8.47 oz by US weight, or 32 tablespoons (1 US cup = 16 tbsp per USDA standard).
Frequently asked questions
How many grams is 1 cup?
It depends on what you're measuring. 1 cup of all-purpose flour = 120 g, 1 cup of sugar = 200 g, 1 cup of butter = 227 g, 1 cup of honey = 340 g. Use the dropdown to pick your ingredient.
How many grams is 2 cups of flour?
240 g of all-purpose flour (2 × 120). For bread flour it's 254 g, whole wheat 226 g, cake flour 228 g. The calculator distinguishes between them.
Is a US cup the same as a metric cup?
No. US cup = 240 ml. Metric/UK cup = 250 ml (about 4.2% larger). Japanese cup = 200 ml. Always check which standard your recipe uses. This converter uses the US cup.
Why should I weigh instead of measure by cups?
Because cups-by-volume vary depending on how you scoop. Flour can pack 20–30% more if you press the measuring cup into the bag vs. spoon-and-level. Grams give you consistent results every time.
How do I measure brown sugar: packed or loose?
Packed. Recipes assume brown sugar is pressed firmly into the cup until it holds its shape when turned out. That's the 213 g/cup figure. Loose brown sugar is roughly 160 g/cup — 25% less — and will throw off your recipe.
What's 1/2 cup in grams?
Halve any 1-cup number. 1/2 cup flour = 60 g, 1/2 cup sugar = 100 g, 1/2 cup butter = 113 g (that's one US "stick"), 1/2 cup oil = 109 g.
Does "1 cup" on a US stick of butter match the calculator?
A full US stick is 1/2 cup = 113 g. Two sticks = 1 cup = 227 g. The calculator uses 227 g/cup for butter, consistent with most US packaging.
How do I convert grams back to cups?
Reverse the formula: Cups = Grams ÷ density (g/cup). For example, 300 g of all-purpose flour ÷ 120 g/cup = 2.5 cups; 400 g of granulated sugar ÷ 200 g/cup = 2 cups. Handy when a recipe gives a weight but you only have measuring cups.
Do sifted and unsifted flour weigh the same per cup?
No. Sifting aerates flour and lowers its density. Unsifted, spoon-and-level all-purpose flour is ~120 g/cup; sifted is ~108–110 g/cup — about 10% less. Watch the wording: "1 cup sifted flour" (sift, then measure) ≠ "1 cup flour, sifted" (measure, then sift).
How many tablespoons are in a cup, and how do I convert tablespoons to grams?
1 cup = 16 tablespoons = 48 teaspoons. To go from tablespoons to grams: (tbsp ÷ 16) × the ingredient's g/cup factor. Example: 3 tbsp of butter = (3/16) × 227 ≈ 42.6 g.
Is this calculator free?
Yes — 100% free, no signup, no ads in your result. Just enter the number of cups and pick the ingredient.
We use cookies to measure traffic (Google Analytics) and show relevant ads. The cookies the site needs to work are always on. You can accept everything, reject the optional ones, or set your own preferences. Learn more · Cookie list ·
How Google uses data
Cookie settings
Choose which cookies to allow. Your choice is saved on this device.
