The direct answer: 100 g of all-purpose flour is about 0.83 cups, 100 g of granulated sugar is about 0.51 cups, and 100 g of butter is about 0.44 cups. That is the number for the ingredient most people mean, but the full story is that this conversion is ingredient-dependent — a cup is 236.6 ml of volume, and what that volume weighs depends entirely on density. This guide gives the complete table for the fifteen ingredients cooks convert most often, worked examples, the method behind each figure (spooned and levelled, packed, or poured), and the honest limits of every number on the page.

1 Gram in Cups by ingredient

All figures below are approximate. Densities come from King Arthur Baking and USDA FoodData Central; verify with a kitchen scale when it matters.

Ingredient 100 g is about 250 g is about
All-purpose flour 0.833 cups 2.083 cups
Granulated sugar 0.505 cups 1.263 cups
Brown sugar (packed) 0.469 cups 1.174 cups
Powdered sugar 0.885 cups 2.212 cups
Butter 0.441 cups 1.101 cups
Honey 0.298 cups 0.744 cups
Milk 0.41 cups 1.025 cups
Water 0.422 cups 1.055 cups
Heavy cream 0.42 cups 1.05 cups
Olive oil 0.463 cups 1.157 cups
Vegetable oil 0.459 cups 1.147 cups
Rolled oats 1.124 cups 2.809 cups
Cocoa powder 1.19 cups 2.976 cups
Table salt 0.347 cups 0.868 cups
Yogurt 0.408 cups 1.02 cups

Method and sources

The method is the whole story for this conversion. There is no single factor, because a cup is a volume and weight depends on density, so the table below is a set of individually measured values: one US cup (236.6 ml) of each ingredient, weighed as stated. King Arthur Baking's chart is the source for most dry goods and sugars, USDA FoodData Central for most liquids, dairy and produce. Dry ingredients are spooned into the cup and levelled; brown sugar is packed; liquids are poured to the line. The dispute notes matter: flour is quoted at 120 g (King Arthur, spooned and levelled), 125 g, 130 g and 142 g (scooped) by different sources, and granulated sugar at 198 g (King Arthur) versus 200 g (USDA rounding). Those ranges are why the results on this page are labelled approximate, and why a scale is the right tool whenever the recipe cannot absorb a 10% error.

Why this conversion comes up

You will use this conversion in two situations above all: following a recipe written in the other system, and scaling a recipe up or down. Both are covered below. The first needs a single lookup; the second needs the same lookup repeated for every ingredient, which is why the table lists the fifteen ingredients cooks convert most often rather than just the one in the title.

Worked examples

Doubling a cookie recipe

A cookie recipe calls for 200 gram of Granulated sugar, and you are doubling it: 400 gram, or about 2.02 cups cups. Double the flour and the sugar by weight if you can, because doubling a volume error doubles the error too. If you must use cups, spoon and level every single one — do not scoop, and do not tap the cup down.

A sauce that needs thickening

A sauce recipe calls for 100 gram of Honey to thicken it. That is about 0.298 cups cups. Cornstarch and flour thicken differently — cornstarch needs to be mixed with cold liquid first or it clumps — and the weight matters more than the volume, because a packed tablespoon of starch weighs far more than a level one.

A glaze with powdered sugar

A glaze recipe calls for 120 gram of Granulated sugar. That is about 0.606 cups cups. Sift powdered sugar before measuring it: it clumps in the bag, and a cup of unsifted powdered sugar weighs more than a cup of sifted. For a smooth glaze, weigh the sugar if you can and add the liquid a teaspoon at a time.

Practical guidance

Reading labels is the other everyday use. A carton of stock is labelled in millilitres, a recipe asks for quarts; a bottle of oil is labelled in litres, a recipe asks for cups; a bag of flour is labelled in kilograms, a recipe asks for pounds. The conversion lets you shop from the recipe rather than guessing at the shelf, and it stops the common mistake of buying a container that is almost — but not quite — enough.

Common mistakes to avoid

  1. Treating all flours as interchangeable by weight. Treating all flours as interchangeable by weight. Cake flour, bread flour, whole-wheat flour and almond flour all weigh differently per cup, and they behave differently too. Convert with the right row of the table, and do not swap flours cup-for-cup without expecting a different result.
  2. Forgetting that salt is not salt. Forgetting that salt is not salt. Fine table salt is 288 g per cup; Diamond Crystal kosher salt is about 128 g per cup and Morton kosher about 256 g. Swapping them cup-for-cup can double or halve the salt in a dish.
  3. Scooping flour with the cup instead of spooning and levelling. Scooping flour with the cup instead of spooning and levelling. Scooping compacts the flour and can add 20 g or more per cup — the single most common reason a cake comes out dry. Spoon the flour in, level it off, and never tap the cup down.
  4. Packing brown sugar when the recipe means loose, or leaving it loose when the recipe means packed. Packing brown sugar when the recipe means loose, or leaving it loose when the recipe means packed. Packed brown sugar is 213 g per cup; loosely spooned it is about 170 g. That 43 g gap changes a cookie completely, so pack it firmly unless the recipe says otherwise.

Frequently asked questions

What is the best way to convert a whole recipe?

Convert every ingredient before you start, write the converted amounts in the margin, and then cook without stopping to calculate. If you own a scale, weigh each ingredient directly in the unit the recipe uses — that is more accurate than any conversion table.

Does brown sugar really weigh more than white sugar?

Yes, when packed. Packed brown sugar is 213 g per cup against 198 g for granulated sugar, because the molasses coating makes the crystals stick together and pack down. Loosely spooned, brown sugar is only about 170 g per cup — which is why the method matters as much as the number.

Why does gram to cups depend on the ingredient?

Because a gram measures volume and a cups measures weight, and different ingredients pack different weights into the same volume. A cup of flour weighs 120 g, a cup of sugar 198 g, a cup of honey 336 g and a cup of butter 227 g. There is no single conversion factor — you need the ingredient's density, which is what the table on this page gives.

How accurate are these conversions?

They are approximate, and honest about it. The figures assume the standard method — dry ingredients spooned and levelled, brown sugar packed, liquids poured — and packing, humidity and temperature can move the weight by a few grams either way. For everyday cooking that is fine. For bread, macarons and anything with yeast, weigh the ingredient on a scale instead of converting.

Why is flour listed at 120 g per cup when other sources say 125 g or 130 g?

Because the figure depends on the method. King Arthur Baking lists 120 g per cup spooned and levelled; other sources quote 125 g or 130 g, and a scooped cup can reach 142 g. The difference is not a mistake in any source — it is the difference between spooning flour into the cup and scooping the cup through the bag. Spoon and level, and 120 g is the right figure.

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