How many grams in a cup of brown sugar?

1 cup of packed brown sugar weighs 213 g by King Arthur Baking's chart. USDA lists 220 g packed and 145 g loosely filled.

Sources: King Arthur Baking ingredient weight chart, USDA FoodData Central · Checked October 10, 2026

Amount

Unit

213 g 7.5 oz

Sources range from 213 g to 220 g for 1 cup.

Converting a whole recipe?

Sous Chef converts every ingredient in a recipe to grams and millilitres in one tap, rounded to amounts you would actually weigh.

Brown sugar cups to grams table

Using 213 g per US cup. A US cup is 236.6 mL; 1 cup is 16 tablespoons.

Brown sugar cups to grams
US cups	Grams	Ounces	Tablespoons
⅛ cup	27 g	0.9 oz	2
¼ cup	53 g	1.9 oz	4
⅓ cup	71 g	2.5 oz	5.3
½ cup	107 g	3.8 oz	8
⅔ cup	142 g	5 oz	10.7
¾ cup	160 g	5.6 oz	12
1 cup	213 g	7.5 oz	16
1½ cups	320 g	11.3 oz	24
2 cups	426 g	15 oz	32
3 cups	639 g	22.5 oz	48
4 cups	852 g	30.1 oz	64

Why sources disagree

Brown sugar is moist and squashes down, so recipes almost always mean packed. How hard you press decides the weight: USDA's packed cup is 7 g heavier than King Arthur's, and a loose cup is about a third lighter. Use the Packed setting unless your recipe says otherwise.

Source	Listed as	Grams per cup
King Arthur Baking ingredient weight chart Brown sugar (dark or light, packed)	1 cup packed = 213 g	213 g
USDA FoodData Central Sugars, brown	1 cup packed = 220 g	220 g

Bold row is the figure the calculator uses. Figures listed for a smaller measure are multiplied up to one cup.

How to measure brown sugar accurately

Recipes usually mean packed brown sugar, so press it into the cup until it is firm.
Weigh on a digital scale when you can, since cup scoops vary from cook to cook.
If you use cups, fill the same way every time so your results stay consistent.

Convert the whole recipe, not one line

Converting a recipe one ingredient at a time is where mistakes slip in. Sous Chef imports a recipe from a link or pasted text, then converts every ingredient at once: dry ingredients and butter to grams, liquids to millilitres. Tap again to go back to cups.

US recipe

2¼ cups all-purpose flour
1 cup butter, softened
¾ cup brown sugar, packed
1½ cups milk

In Sous Chef, after "Convert to metric"

275 g all-purpose flour
225 g butter, softened
170 g brown sugar, packed
350 ml milk

Example output. Sous Chef rounds to amounts you would actually weigh, so its numbers can differ by a few grams from the table above.

Common questions

How many grams is half a cup of brown sugar?

Half a cup of brown sugar is about 107 g, using 213 g per cup.

How many grams is 1 tablespoon of brown sugar?

1 tablespoon of brown sugar is about 13 g, since 1 cup is 16 tablespoons and 213 g per cup divided by 16 is 13 g.

More conversions

Cook in grams without doing the math.

Import any recipe and Sous Chef converts it, scales it, or swaps an ingredient for you. Free to download on iPhone.