Why does a cup of flour weigh less than a cup of sugar?

Flour is light and airy with more trapped air between particles, while granulated sugar crystals pack more densely — so the same volume contains a different mass for each ingredient.

How accurate are these weight conversions?

They use commonly cited average weights per cup, but actual weight can vary by up to 10-15% depending on how an ingredient is packed, scooped, or sifted — for baking precision, weighing directly on a kitchen scale is always more accurate than converting from volume.

Why do professional bakers prefer weight over volume?

Weight measurements are unaffected by how tightly an ingredient is packed into a measuring cup, making them far more consistent and reproducible than volume measurements — especially important for delicate recipes like bread and pastry.

Is my ingredient data sent anywhere?

No — all conversions are calculated locally in your browser using fixed density values, with nothing sent to any server.

Free Online Ingredient Weight Converter

Convert Cups and Tablespoons to Grams for Common Baking Ingredients

Need to use Ingredient Weight Converter right now?

A cup of flour and a cup of sugar don't weigh the same amount — different ingredients pack to different densities, so recipes written by weight (common in professional and European baking) can't be accurately converted to volume, or vice versa, using a single universal conversion factor.

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Amount

Volume unit

Ingredient

Weight in grams

120 g

Weight in ounces

4.23 oz

1 cup of all-purpose flour ≈ 120g. Weight conversions are approximate — actual weight varies with how ingredients are packed or sifted.

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About Ingredient Weight Converter

This tool converts a volume measurement of a specific ingredient — flour, sugar, butter, brown sugar, milk, or water — into its equivalent weight in grams and ounces, using commonly cited average weights per cup for each ingredient.

It's most useful when following a recipe written in weight while only having volume measuring cups on hand, or the reverse: converting a volume-based recipe to weight for more precise, scale-based baking, which professional bakers generally consider more accurate than volume measurement.

How it works

Enter an amount and volume unit. Input the quantity and select cup, tablespoon, teaspoon, or another volume unit.
Select the ingredient. Choose from common baking ingredients like flour, sugar, or butter.
Read the weight. See the equivalent weight in grams and ounces instantly.

Examples

1 cup of all-purpose flour

Input

1 cup, All-purpose flour

Output

≈ 120 g (4.23 oz)