Packed brown sugar grams to cups
To convert grams to cups, divide the grams by 220. For example, 100 g of brown sugar ≈ 0.45 cup.
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Brown sugar is the one ingredient where "1 cup" is meaningless unless it's packed. Pressed firmly into the cup, it weighs about 220g; loosely spooned, it can drop to 145g or less. A scale removes the guesswork entirely.
Packed brown sugar grams to cups chart (US cup)
| Grams | Cups (approx.) | Decimal cups |
|---|---|---|
| 25 g | ⅛ cup | 0.11 |
| 50 g | ¼ cup | 0.23 |
| 75 g | ⅓ cup | 0.34 |
| 100 g | 0.45 cup | 0.45 |
| 125 g | 0.57 cup | 0.57 |
| 150 g | ⅔ cup | 0.68 |
| 175 g | 0.8 cup | 0.8 |
| 200 g | ⅞ cup | 0.91 |
| 250 g | 1⅛ cups | 1.14 |
| 300 g | 1⅓ cups | 1.36 |
| 400 g | 1.82 cups | 1.82 |
| 500 g | 2¼ cups | 2.27 |
Why brown sugar weighs what it does
Brown sugar is white sugar coated in molasses, and that sticky film makes the crystals cling together with air pockets between them. Left alone it stays fluffy and light; pressed down, the pockets collapse and a cup holds far more. That's why recipes specify "firmly packed," the standard behind the 220g figure. Dark brown sugar carries slightly more molasses than light, so it packs a touch denser, and sugar that has dried and hardened in the bag packs unpredictably once you break it up.
How to measure brown sugar
Scoop brown sugar into a dry measuring cup, then press it down firmly with the back of a spoon or your fingers, adding more until it's level and compacted. When tipped out, properly packed brown sugar holds the shape of the cup like a sandcastle. A scale set to 220g per cup is faster and far more consistent than packing by feel.
Common mistake
The big one is measuring brown sugar loosely, the way you would flour. Spooned in without packing, a "cup" can weigh as little as 145g, leaving baked goods dry, pale, and short on the caramel chew brown sugar is meant to provide. The opposite error, over-packing rock-hard sugar, throws the amount off too.
Other cup sizes
| Cup type | 1 cup of brown sugar |
|---|---|
| US cup (240 ml) | 220 g |
| Metric cup (250 ml) | 229 g |
| Australian / South African cup (250 ml) | 229 g |
| Imperial cup (284 ml) | 260 g |
Where it matters
Brown sugar drives chocolate chip cookies, blondies, banana bread, gingerbread, BBQ rubs, and caramel sauces, where its molasses adds moisture, chew, and color. Getting the weight right matters most in cookies and bars: too little and they spread thin and crisp; too much and they turn dense and greasy. Weighing protects that texture.
FAQ
Does packed brown sugar really weigh more than loose?
Yes, considerably. Firmly packed it's about 220g per US cup, but spooned in loosely it can fall to 145g or less. Nearly every recipe assumes packed, which is why a scale is the safest bet.
Is there a weight difference between light and dark brown sugar?
Only a small one. Dark brown sugar has more molasses, so it packs marginally denser, but for everyday baking both are treated as roughly 220g per packed cup. The flavor difference matters more than the weight.
My brown sugar is rock hard. Can I still measure it accurately?
Soften it first. Hardened sugar packs erratically and can throw your measurement off in either direction. Microwave it with a damp paper towel for 20 seconds, or seal it overnight with a slice of bread, then measure.
How many grams is half a cup of packed brown sugar?
About 110g, exactly half of the 220g full cup. A quarter cup is roughly 55g and a third cup about 73g, assuming the sugar is firmly packed each time.