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½ US Cup Cultured Buttermilk = 121g

½ US Cup of cultured buttermilk weighs 121 grams (4.27 ounces or 0.27 pounds; 118.3 mL or 8 tablespoons in volume) when measured poured liquid at a verified bulk density of 242g per 236.6 mL US Customary cup.

Imperial weight: 4.27 oz (0.27 lb) • Volume: 118.3 mL (8 tbsp)

Batch
Measuring density
Converted Measure
0.5 US cup Cultured Buttermilk (poured liquid) =
121 g
Physical scoop breakdown0.50 cups
1/2 cup
Edit either side to reverseButtermilk chart →
Grams
121 g
Ounces
4.27 oz
US Cups
½ cup
Metric (250mL)
0.47 c
Tablespoons
8 tbsp
Milliliters
118.3 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 ½ US Cup Cultured Buttermilk

Batch scaling conversion table around ½ 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×) 60.5g (2.13 oz) ¼ cup 59.1 mL
Standard (1×) 121g (4.27 oz) ½ cup 118.3 mL
1.5× Batch 181.5g (6.4 oz) ¾ cup 177.4 mL
Double Batch (2×) 242g (8.54 oz) 1 cup 236.6 mL
Triple Batch (3×) 363g (12.8 oz) 1 ½ cups 354.9 mL

Measuring ½ US Cup of Cultured Buttermilk in the Kitchen

Measured poured liquid at a verified bulk density of 242g per US cup, ½ US cup of cultured buttermilk weighs 121 grams (4.27 ounces). Measured using the vigorously shaken cultured buttermilk method (242g/cup), that same ½ cup holds 121g — 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 ½ cup of cultured buttermilk? ▾

½ US Cup of cultured buttermilk measured poured liquid weighs 121 grams (4.27 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.