2/3 Cup of Brown Sugar in Grams
2/3 cup of brown sugar (packed) weighs 142 grams (about 5 oz), based on 213 g per US cup (packed into the cup). That's the same as 10.7 tablespoons of brown sugar (packed). When a recipe's outcome depends on accuracy — especially baking — weigh it instead of measuring by cup.
Few measuring sets include a 2/3 cup, so this is normally 2 × 1/3 cup (71 g each). Without a 1/3 measure either, 10 tablespoons + 2 teaspoons is exact.
How much is 2/3 cup of brown sugar (packed)?
| Grams | 142 g |
|---|---|
| Ounces (weight) | 5 oz |
| Tablespoons | 10.7 tbsp |
| Teaspoons | 32 tsp |
| Density used | 213 g per US cup |
No 2/3 cup measure? Use spoons
2/3 cup is exactly 10 tablespoons + 2 teaspoons, which is 142 g of brown sugar (packed). Measuring spoons are stamped to a tighter tolerance than cups, so for small amounts the spoon route is usually the more accurate one even when you do own the cup.
Halving and doubling 2/3 cup
Scaling a recipe is the usual reason this conversion comes up, and grams scale cleanly where cup fractions do not:
| Recipe | Cups | Grams | Spoons |
|---|---|---|---|
| Half | ⅓ cup | 71 g | 5 tablespoons + 1 teaspoon |
| As written | ⅔ cup | 142 g | 10 tablespoons + 2 teaspoons |
| Double | 1 ⅓ cups | 284 g | 21 tablespoons + 1 teaspoon |
Nearby amounts
| Cups | Grams | Ounces |
|---|---|---|
| ⅓ cups | 71 g | 2.5 oz |
| ½ cups | 107 g | 3.8 oz |
| ⅔ cups | 142 g | 5 oz |
| ¾ cups | 160 g | 5.6 oz |
| 1 cup | 213 g | 7.5 oz |
Every cup fraction of brown sugar in grams — the full chart.
How to measure 2/3 cup of brown sugar (packed)
Brown sugar is always measured packed: press it firmly into the cup until it holds the cup’s shape when turned out. Packed is 213 g per cup; loosely filled can weigh 25% less, which noticeably changes moisture and spread in cookies.
2/3 cup of other ingredients
- 2/3 cup all-purpose flour in grams — 80 g
- 2/3 cup granulated sugar in grams — 133 g
- 2/3 cup powdered sugar in grams — 80 g
- 2/3 cup honey in grams — 227 g
- 2/3 cup butter in grams — 151 g
Convert another amount
250 cups Light brown sugar (packed) = 53250 g
Based on 213 g per US cup.
Reverse conversion: grams of brown sugar to cups.
Density 213 g/cup — sources: King Arthur Baking ingredient weight chart, USDA FoodData Central. Data verified 2026-08-20. Methodology.