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⅓ US Cup Cultured Buttermilk = 80.7g

⅓ US Cup of cultured buttermilk weighs 80.7 grams (2.85 ounces or 0.18 pounds; 78.9 mL or 5.33 tablespoons in volume) when measured poured liquid at a verified bulk density of 242g per 236.6 mL US Customary cup.

Imperial weight: 2.85 oz (0.18 lb) • Volume: 78.9 mL (5.33 tbsp)

Batch
Measuring density
Converted Measure
0.33 US cup Cultured Buttermilk (poured liquid) =
80.7 g
Physical scoop breakdown0.33 cups
1/3 cup
Edit either side to reverseButtermilk chart →
Grams
80.7 g
Ounces
2.85 oz
US Cups
⅓ cup
Metric (250mL)
0.32 c
Tablespoons
5.33 tbsp
Milliliters
78.9 mL

Kitchen note: Test-kitchen baseline uses poured liquid (242g/cup). Switching to vigorously shaken cultured buttermilk (242g/cup) changes each cup by 0g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around ⅓ US Cup Cultured Buttermilk

Batch scaling conversion table around ⅓ US Cup of Cultured Buttermilk (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×) 40.3g (1.42 oz) 2 tbsp + 2 tsp 39.4 mL
Standard (1×) 80.7g (2.85 oz) ⅓ cup 78.9 mL
1.5× Batch 121g (4.27 oz) ½ cup 118.3 mL
Double Batch (2×) 161.3g (5.69 oz) ⅔ cup 157.7 mL
Triple Batch (3×) 242g (8.54 oz) 1 cup 236.6 mL

Measuring ⅓ US Cup of Cultured Buttermilk in the Kitchen

Measured poured liquid at a verified bulk density of 242g per US cup, ⅓ US cup of cultured buttermilk weighs 80.7 grams (2.85 ounces). Measured using the vigorously shaken cultured buttermilk method (242g/cup), that same ⅓ cup holds 80.7g — virtually identical weight in your mixing bowl.

Shake container vigorously before pouring to reconstitute settled cultured curds into a creamy fluid.

Source note: USDA FoodData Central #171271 & King Arthur standard (242g/cup)

Frequently Asked Questions

How many grams is ⅓ cup of cultured buttermilk? ▾

⅓ US Cup of cultured buttermilk measured poured liquid weighs 80.7 grams (2.85 ounces).

Why does buttermilk produce exceptionally tender baked goods? ▾

Lactic acid weakens gluten networks and reacts vigorously with alkaline baking soda, generating carbon dioxide lift and a soft crumb.

Can you freeze leftover buttermilk for future baking? ▾

Yes, freeze in 1/2-cup portions or ice cube trays; thaw and whisk to blend before mixing into batters.