Brown Sugar (loose): Grams to Cups
1 cup of brown sugar (loose) = 145 grams
One US cup of brown sugar (loose) weighs 145 grams. One 250 ml metric cup — the one used in the UK, Australia, New Zealand and Canada — holds 153 grams. To convert any weight, divide the grams by the figure for your cup.
Loose, unpacked brown sugar weighs about 145 g per cup on USDA FoodData Central's figure — a third less than packed (220 g). Only use this row if a recipe explicitly says the brown sugar is not packed.
Where the 145 g figure comes from
- USDA FoodData Central: 1 cup unpacked of “Sugars, brown” = 145 g (FDC ID 168833)
This site uses 145 g per US cup of brown sugar (loose), spooned and levelled. References checked September 2026.
How many cups is X grams of brown sugar (loose)?
| Grams | US cups | Metric cups | Tablespoons | Ounces |
|---|---|---|---|---|
| 25 g brown sugar (loose) | ⅛ | ⅛ | 2.76 | 0.88 |
| 50 g brown sugar (loose) | ⅓ | ⅓ | 5.52 | 1.76 |
| 75 g brown sugar (loose) | ½ | ½ | 8.28 | 2.65 |
| 100 g brown sugar (loose) | ⅔ | ⅔ | 11.03 | 3.53 |
| 110 g brown sugar (loose) | ¾ | ¾ | 12.14 | 3.88 |
| 120 g brown sugar (loose) | ⅞ | ¾ | 13.24 | 4.23 |
| 125 g brown sugar (loose) | ⅞ | ⅞ | 13.79 | 4.41 |
| 130 g brown sugar (loose) | ⅞ | ⅞ | 14.34 | 4.59 |
| 140 g brown sugar (loose) | 1 | ⅞ | 15.45 | 4.94 |
| 150 g brown sugar (loose) | 1 | 1 | 16.55 | 5.29 |
| 170 g brown sugar (loose) | 1⅛ | 1⅛ | 18.76 | 6.00 |
| 175 g brown sugar (loose) | 1¼ | 1⅛ | 19.31 | 6.17 |
| 200 g brown sugar (loose) | 1⅜ | 1⅓ | 22.07 | 7.05 |
| 225 g brown sugar (loose) | 1½ | 1½ | 24.83 | 7.94 |
| 240 g brown sugar (loose) | 1⅔ | 1⅝ | 26.48 | 8.47 |
| 250 g brown sugar (loose) | 1¾ | 1⅝ | 27.59 | 8.82 |
| 275 g brown sugar (loose) | 1⅞ | 1¾ | 30.34 | 9.70 |
| 300 g brown sugar (loose) | 2⅛ | 1.96 | 33.1 | 10.58 |
| 350 g brown sugar (loose) | 2⅜ | 2¼ | 38.62 | 12.35 |
| 400 g brown sugar (loose) | 2¾ | 2⅝ | 44.14 | 14.11 |
| 450 g brown sugar (loose) | 3⅛ | 2.94 | 49.66 | 15.87 |
| 500 g brown sugar (loose) | 3½ | 3¼ | 55.17 | 17.64 |
How to measure brown sugar (loose) accurately
The 145 g figure assumes the spooned-and-levelled method: spoon the brown sugar (loose) into a dry measuring cup and sweep the top flat with a straight edge. Scooping the cup through the bag compacts it and gives a heavier cup.
- 1 US cup of brown sugar (loose) = 145 g
- 1 metric cup (250 ml) of brown sugar (loose) = 153 g
- ¾ cup = 109 g
- ½ cup = 73 g
- ⅓ cup = 48 g
- ¼ cup = 36 g
- 1 tablespoon = 9.1 g
Frequently asked questions
How many cups is 100 grams of brown sugar (loose)?
100 grams of brown sugar (loose) is about ⅔ US cups, based on 145 g per cup, or ⅔ metric cups.
How many grams in a cup of brown sugar (loose)?
One US cup of brown sugar (loose) weighs 145 grams. A 250 ml metric cup holds 153 grams.
How many cups is 250 grams of brown sugar (loose)?
250 grams of brown sugar (loose) is about 1¾ US cups, or 1⅝ metric cups.
Does a UK cup of brown sugar (loose) weigh the same as a US cup?
No. A UK, Australian or Canadian metric cup is 250 ml against the US 236.6 ml, so it holds about 5.7% more — 153 g of brown sugar (loose) rather than 145 g.
How many tablespoons is 100 grams of brown sugar (loose)?
100 grams of brown sugar (loose) is about 11.03 tablespoons.
More sugars and sweeteners conversions: Brown Sugar (packed) grams to cups.