Convert US Cups to Grams for Cooking & Baking

What is the Cups to Grams Converter?

The Cups to Grams Converter is a free online tool for converting between volume (cups) and weight (grams) for over 60 common cooking and baking ingredients. Since different ingredients have different densities, a cup of flour weighs much less than a cup of sugar. This converter accounts for these differences to give you precise measurements every time. You may also find our Cooking Converter and Cups to Liters Converter helpful for your kitchen measurements.

Professional bakers worldwide prefer weight measurements because they are more accurate and reproducible. How tightly you pack flour into a cup, whether you sift it first, or even the humidity in your kitchen can all change how many grams end up in that cup. Using a kitchen scale eliminates this variability.

How to Use the Cups to Grams Converter

Select direction: Choose "Cups to Grams" or "Grams to Cups".
Enter the amount: Type a number or tap a quick fraction button (1/4, 1/2, 1, etc.).
Select an ingredient: Browse by category (Flours, Sugars, Dairy & Fats, etc.) or search by name.
View the conversion: Your result appears instantly with the gram equivalent and ounce equivalent.
Use the reference table: See a quick reference grid showing conversions for common amounts.

Why Weight Measurements Matter

Cups measure volume while grams measure weight. A cup of feathers weighs far less than a cup of lead, and the same principle applies to ingredients. One cup of all-purpose flour weighs about 120 grams, while one cup of granulated sugar weighs about 200 grams -- a 67% difference for the same volume.

For best results in baking, always use the spoon and level method: spoon the ingredient into the measuring cup and level off with a straight edge. Do not scoop directly from the bag, as this can pack the ingredient and give you up to 25% more than intended.

Common Conversions

Ingredient	1/4 cup	1/2 cup	1 cup	2 cups
All-Purpose Flour	30g	60g	120g	240g
Granulated Sugar	50g	100g	200g	400g
Butter	57g	114g	227g	454g
Brown Sugar (packed)	55g	110g	220g	440g
Rolled Oats	23g	45g	90g	180g
Honey	85g	170g	340g	680g

US Cup vs Metric Cup

This converter uses the US customary cup (236.588 mL). Different countries use different cup sizes:

US Cup: 236.588 mL (used in this converter)
Metric Cup: 250 mL (Australia, New Zealand, Canada)
Imperial Cup: 284.131 mL (historical UK measurement)
Japanese Cup: 200 mL (used in Japanese cooking)

Frequently Asked Questions

Why do cups to grams conversions vary by ingredient?

Cups measure volume while grams measure weight. Different ingredients have different densities. For example, 1 cup of flour weighs about 120 grams, but 1 cup of sugar weighs about 200 grams because sugar is denser. This is why you need ingredient-specific conversions for accurate baking.

How many grams is 1 cup of all-purpose flour?

1 cup of all-purpose flour weighs approximately 120 grams (4.23 oz). This is based on the spoon-and-level method. Scooping flour directly can pack it more tightly, yielding up to 150 grams per cup.

Is it better to measure baking ingredients by weight or volume?

Measuring by weight (grams) is more accurate and consistent than measuring by volume (cups). Professional bakers and most international recipes use weight measurements because the amount of an ingredient in a cup can vary based on how it is scooped, packed, or settled.

How many grams is 1 cup of butter?

1 cup of butter weighs 227 grams (8 oz), which equals 2 standard sticks of butter. A half cup (1 stick) is approximately 113.5 grams.

What is the difference between a US cup and a metric cup?

A US customary cup equals 236.588 milliliters, while a metric cup (used in Australia and some other countries) equals 250 milliliters. This converter uses the US cup measurement. If you are using a metric cup, your gram values will be slightly higher, roughly 5.7% more.

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Cups to Grams Converter