| US cup amount | Weight |
|---|---|
| 1/8 cup | 27 g |
| 1/4 cup | 53 g |
| 1/3 cup | 71 g |
| 1/2 cup | 106 g |
| 3/4 cup | 160 g |
| 1 cup | 213 g |
| 1 1/2 cups | 320 g |
| 2 cups | 426 g |
Brown Sugar Grams to Cups
1 US cup of brown sugar weighs 213 grams. One packed US cup of light or dark brown sugar weighs 213 grams. The word packed matters because loosely filled brown sugar leaves air gaps and produces a lower cup weight.
Use the converter and charts below for light or dark brown sugar, packed.
Grams to Cups Converter
Choose the ingredient before converting because every ingredient has a different weight per cup.
Grams to Cups Converter
Results use the documented ingredient state and one US customary cup.
Divide the gram amount by 213 to calculate US cups. The practical fraction is a measuring aid, not a replacement for the exact gram weight.
| Grams | US cups | Practical reference |
|---|---|---|
| 25 g | 0.12 cups | about 1/8 cup |
| 30 g | 0.14 cups | about 1/8 cup |
| 40 g | 0.19 cups | about 1/4 cup |
| 50 g | 0.23 cups | about 1/4 cup |
| 60 g | 0.28 cups | about 1/4 cup |
| 75 g | 0.35 cups | about 1/3 cup |
| 80 g | 0.38 cups | about 3/8 cup |
| 100 g | 0.47 cups | about 1/2 cup |
| 120 g | 0.56 cups | about 5/8 cup |
| 125 g | 0.59 cups | about 5/8 cup |
| 150 g | 0.7 cups | about 2/3 cup |
| 200 g | 0.94 cups | about 7/8 cup |
| 250 g | 1.17 cups | about 1 1/8 cup |
| 300 g | 1.41 cups | about 1 3/8 cup |
| 400 g | 1.88 cups | about 1 7/8 cup |
| 500 g | 2.35 cups | about 2 1/3 cup |
Press brown sugar into a dry cup until it holds the cup's shape when turned out, then level the surface. Break up hard lumps before measuring so the cup fills evenly.
Grams = cups × 213
One cup is 213 grams, one-half cup is about 106 grams and one-quarter cup is about 53 grams.
Common uses
- Soft cookies
- Crumb toppings
- Barbecue sauces and glazes
Brown sugar contains molasses and clumps more readily than granulated sugar. Light and dark brown sugar share this practical packed reference, but moisture and compaction can still change a real cup slightly.
The converter does not assume that every cup weighs 237 or 250 grams. It uses the documented value for the exact ingredient and state selected.
If a product label or recipe publisher supplies a different gram weight for one cup, follow that recipe-specific value for the closest match to the original testing.
Method and source
How this conversion was checked
This page uses 213 grams per US cup for light or dark brown sugar, packed. The result assumes the sugar is packed.
Primary reference: King Arthur Baking Ingredient Weight Chart
Cup standard: NIST US customary cup reference
How many grams are in one cup of brown sugar?
One US cup of light or dark brown sugar, packed uses a working reference of 213 grams on GramstoCup.co.
How many cups is 100 grams of brown sugar?
100 grams of light or dark brown sugar, packed is 0.47 US cups.
How many grams is half a cup of brown sugar?
Half a US cup is approximately 106 grams using the 213 gram full-cup reference.
Can the result vary by brand or method?
Yes. The result assumes the sugar is packed. Use the original recipe weight when precision is important.
Are these US cups or metric cups?
The results use a US customary cup. A metric cup is 250 milliliters and can produce a different answer.
Other Ingredient Guides
Each guide uses its own grams-per-cup standard.
Editorial review
Reviewed for clarity and consistency
Written and reviewed by William Leo. Ingredient values are checked against the methodology and sources listed on this page.
Last reviewed
August 23, 2026