Buttermilk:
Grams to Cups
One cup of buttermilk weighs 245 grams, making it one of the denser liquid dairy ingredients in baking. Its tangy acidity and creamy consistency make it irreplaceable in pancakes, waffles, and Southern-style biscuits.
Convert Buttermilk
1 cup = 245 grams
= — grams
= — cups
Quick reference
Measurement Table
| Cups | Grams | Ounces |
|---|---|---|
| ⅛ cup | 31 g | 1.09 oz |
| ¼ cup | 61 g | 2.15 oz |
| ⅓ cup | 82 g | 2.89 oz |
| ½ cup | 123 g | 4.34 oz |
| ⅔ cup | 163 g | 5.75 oz |
| ¾ cup | 184 g | 6.49 oz |
| 1 cup | 245 g | 8.64 oz |
| 1¼ cups | 306 g | 10.79 oz |
| 1½ cups | 368 g | 12.98 oz |
| 2 cups | 490 g | 17.28 oz |
| 3 cups | 735 g | 25.93 oz |
About Buttermilk
Buttermilk's acidity is what makes it so valuable in baking. When it reacts with baking soda, it releases carbon dioxide bubbles that give cakes, muffins, and quick breads a light, tender crumb. This chemical leavening is faster and more reliable than relying solely on mechanical aeration.
At 245 grams per cup, buttermilk is slightly denser than regular milk (approximately 240 g/cup) due to its thicker consistency. This difference is small enough that you can substitute buttermilk for milk in most recipes without adjusting other liquid quantities.
If you don't have buttermilk on hand, you can make a quick substitute: add 1 tablespoon of white vinegar or lemon juice to a measuring cup, then fill to the 1-cup line (245 g / 240 ml) with regular milk. Let it sit for 5 minutes until it curdles slightly before using.
Frozen buttermilk retains its leavening properties well. Pour leftover buttermilk into ice cube trays, freeze, then store in a bag. Each standard cube holds roughly 30 g, making it easy to portion for future recipes.
Tips for measuring Buttermilk
- Shake the container well before measuring — buttermilk can separate.
- Use a liquid measuring cup and check at eye level for accuracy.
- Room-temperature buttermilk incorporates more evenly into batter.
- DIY substitute: 1 tbsp vinegar + milk to the 240 ml line, rest 5 min.
Common mistakes
- Using cold buttermilk straight from the fridge — it can shock butter-based batters.
- Skipping the shake — separated buttermilk gives inconsistent acidity.
- Forgetting to reduce baking soda when substituting for regular milk.
Frequently Asked Questions
- How many grams in a cup of Buttermilk?
- 1 cup of Buttermilk weighs 245 grams. This is the standard measurement used in most American recipes.
- How many cups is 245 grams of Buttermilk?
- 245 grams of Buttermilk equals exactly 1 cup. For partial amounts, use the converter above or the measurement table.
- Is 245 g per cup accurate for all brands?
- 245 g/cup is the widely accepted standard. Minor brand-to-brand variation exists (±5–10%), but for most baking purposes this figure is reliable.