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⅔ US Cup Dark Brown Sugar = 142g

⅔ US Cup of dark brown sugar weighs 142 grams (5.01 ounces or 0.31 pounds; 157.7 mL or 10.67 tablespoons in volume) when measured firmly packed at a verified bulk density of 213g per 236.6 mL US Customary cup.

Imperial weight: 5.01 oz (0.31 lb) • Volume: 157.7 mL (10.67 tbsp)

Batch
Measuring density
Converted Measure
0.67 US cup Dark Brown Sugar (firmly packed) =
142 g
Physical scoop breakdown0.67 cups
1/3 cup
1/3 cup
Edit either side to reverseDark Brown Sugar chart →
Grams
142 g
Ounces
5.01 oz
US Cups
⅔ cup
Metric (250mL)
0.63 c
Tablespoons
10.67 tbsp
Milliliters
157.7 mL

Kitchen note: Test-kitchen baseline uses firmly packed (213g/cup). Switching to unpacked / loose (150g/cup) changes each cup by 63g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around ⅔ US Cup Dark Brown Sugar

Batch scaling conversion table around ⅔ US Cup of Dark Brown Sugar (0.5× to 3× recipe batches in grams, ounces, US cups, and milliliters)
Batch Scale Weight (g / oz) US Cups & Spoons Metric (mL)
Half Batch (0.5×) 71g (2.5 oz) ⅓ cup 78.9 mL
Standard (1×) 142g (5.01 oz) ⅔ cup 157.7 mL
1.5× Batch 213g (7.51 oz) 1 cup 236.6 mL
Double Batch (2×) 284g (10.02 oz) 1 ⅓ cups 315.5 mL
Triple Batch (3×) 426g (15.03 oz) 2 cups 473.2 mL

Measuring ⅔ US Cup of Dark Brown Sugar in the Kitchen

Measured firmly packed at a verified bulk density of 213g per US cup, ⅔ US cup of dark brown sugar weighs 142 grams (5.01 ounces). Measured using the unpacked / loose method (150g/cup), that same ⅔ cup holds 100g — a 42g difference in your mixing bowl.

Pack firmly into the measuring cup to press out all air pockets. Dark brown sugar contains approximately 6.5% molasses, making it denser and stickier than light brown sugar.

Source note: King Arthur Baking standard (213g/cup packed) & USDA FDC #169657

Frequently Asked Questions

How many grams is ⅔ cup of dark brown sugar? ▾

⅔ US Cup of dark brown sugar measured firmly packed weighs 142 grams (5.01 ounces).

What is the culinary difference between light and dark brown sugar? ▾

Dark brown sugar has nearly double the molasses content, imparting deeper caramel flavor, darker color, and higher acidity.

Can I swap dark brown sugar for light brown sugar 1:1 by weight? ▾

Yes, substitute gram for gram; recipes will bake with slightly more moisture and a pronounced molasses aroma.