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Fixed weight / 08

100 grams
to cups.

There is no single 100-gram cup answer because grams measure mass while cups measure volume. Choose the ingredient and its measuring state before converting.

Short answer100 g is about 0.83 US cup of all-purpose flour, 0.51 cup of granulated sugar, or 0.47 cup of packed brown sugar.

These are calculated from the cited grams-per-cup references below. They are ingredient-specific estimates, not a universal conversion.

Reference table
All-purpose flour0.83 US cup120 g per cup reference
Granulated sugar0.51 US cup198 g per cup reference
Packed brown sugar0.47 US cup213 g per cup reference
Unsweetened cocoa1.19 US cups42 g per ½ cup reference
Butterabout 0.44 US cup113 g per ½ cup reference

The formula behind the result

PantryGauge uses cups = grams ÷ grams per cup. The density value must match the named ingredient, its physical state, and the measuring method. That is why 100 g of flour does not occupy the same space as 100 g of sugar.

For baking, a scale is the most repeatable option. If a recipe gives both grams and cups, follow the recipe's own weight convention rather than silently replacing it with a rounded chart value.

Why the ingredient matters

King Arthur Baking lists all-purpose flour at 120 g per US cup, granulated sugar at 198 g, packed brown sugar at 213 g, and unsweetened cocoa at 42 g per half cup. The 100 g results on this page are arithmetic derived from those references.

Flour is especially sensitive to technique. Spoon it into a cup and level it when a recipe calls for volume; do not compress it like brown sugar.

Cup systems and packaged ingredients

This page uses a US cooking cup unless a source is labelled otherwise. A metric cup is 250 mL, while US and nutrition-label conventions can be approximately 237–240 mL. A cup-to-gram result must not mix those systems silently.

For branded or packaged foods, the package label and the recipe's stated convention take priority over a generic chart.

Questions readers ask

How many cups is 100 g of flour?

Using King Arthur Baking's 120 g per US cup all-purpose-flour reference, 100 g is about 0.83 US cup.

Is 100 g always one cup?

No. Cups measure volume and grams measure mass, so the result changes with the ingredient's density and preparation state.

How many cups is 100 g of brown sugar?

Using the 213 g per US cup packed brown-sugar reference on this page, 100 g is about 0.47 packed US cup. Brown-sugar sources vary, so keep the packing method visible.

Should I use a scale instead?

Yes. A scale is usually more repeatable for baking, especially when flour is aerated or brown sugar is packed.

Sources and method

Numerical answers are tied to the stated ingredient, state, cup convention, and source. Derived values are calculated from the cited reference and rounded for kitchen use.