Density
1.03 g/ml
Cultured dairy product with a tangy flavour and thick consistency.
Buttermilk is both liquid and acid, so it changes tenderness, rise, and flavor at the same time. That makes it especially important in cakes, pancakes, biscuits, and quick breads using baking soda.
Buttermilk density at a glance
Buttermilk is heavier than a generic water-based kitchen estimate, and its acidity changes how batters rise. If you are converting by volume, this is one of the ingredients where the density really matters.
1 cup
245g
1 tbsp
15.3g
Properties
Density Index
1.03 g/cm3
1 Cup Weight
245g
Texture
Solid/Liquid
Category
Dairy
Top Substitute
Milk + Lemon Juice
Use 1 cup milk + 1 tbsp lemon juice, let sit 5 minutes
The acid curdles the milk, mimicking buttermilk's acidity and thickness.
Most-used links for Buttermilk
Conversion
Buttermilk cups to grams
1 cup = 245g
Conversion
Buttermilk grams to cups
Reverse the most common baking lookup.
Conversion
Buttermilk tablespoons to grams
Useful for small-batch adjustments and spoon measures.
Best Substitute
Milk + Lemon Juice
Use 1 cup milk + 1 tbsp lemon juice, let sit 5 minutes for the closest starting point.
Where Buttermilk shines
- Pancakes, waffles, biscuits, and quick breads that need tenderness and lift.
- Chocolate and spice cakes where a little tang improves flavor.
- Recipes using baking soda as the main leavener.
What to watch
- Plain milk is not equivalent unless you add acid back in.
- Brand thickness varies, which can slightly change batter consistency.
- Extra acidity can sharpen flavor if the recipe already uses several acidic ingredients.
Conversions
| cups | grams |
|---|---|
| 1/4 cups | 60.9 grams |
| 1/3 cups | 80.4 grams |
| 1/2 cups | 122 grams |
| 1 cups | 244 grams |
| 1.50 cups | 366 grams |
| 2 cups | 487 grams |
| 3 cups | 731 grams |
| 4 cups | 975 grams |
Density: 1.03 g/ml
Quick Convert
Ingredient-specific, density-based conversions for baking
244
gramsIngredient-specific · density-based
Density-specific references, not generic cup charts · NIST-DB-72
Recommended Tools & Pantry Picks for Buttermilk
Optional shopping references for bakers who want to compare tools and pantry options related to buttermilk.
Digital Kitchen Scale
Essential for cup-to-gram accuracy and repeatable bakes.
Shop scales ↗Measuring Cup & Spoon Set
Useful for quick volume checks before converting to weight.
Shop measuring sets ↗Disclosure: Some outbound links are affiliate links. As an Amazon Associate, CupOrGram earns from qualifying purchases. Learn more.
Substitutions for Buttermilk
Milk + Lemon Juice
excellent1 cup milk + 1 tbsp lemon juice, let sit 5 minutes
The acid curdles the milk, mimicking buttermilk's acidity and thickness.
The acid curdles the milk, mimicking buttermilk's acidity and thickness.
Milk + Vinegar
excellent1 cup milk + 1 tbsp white vinegar, let sit 5 minutes
Same principle as lemon juice. Use white vinegar for neutral flavour.
Same principle as lemon juice. Use white vinegar for neutral flavour.
Yogurt + Water
good3/4 cup yogurt + 1/4 cup water
Similar acidity and tang. Thinner consistency when diluted with water.
Similar acidity and tang. Thinner consistency when diluted with water.
Storage Tips
Refrigerate. Lasts 2-3 weeks. Freezes well for baking use.
Baking Science
Acidity (pH ~4.5) tenderizes gluten, activates baking soda, and creates a tender crumb. The tangy flavour enhances many baked goods.
Recipe Notes
Pancakes & Waffles
Buttermilk helps keep the interior tender while also supporting browning on the griddle.
Biscuits
Its acidity softens the dough and pairs well with baking soda or baking powder for a lighter crumb.
Chocolate Cake
Buttermilk adds tang and supports the reaction between cocoa, acid, and leavening.
Common Pitfalls
- Switching brands without re-checking weight can change texture and bake time.
- Using volume-only measurements for dense ingredients can overshoot recipe targets.
- Butter and dairy temperature affects emulsion stability and spread.
Brand Variance & Measuring Method
Baseline reference: 1 cup buttermilk = 245g. In real kitchens, a practical range is usually 230g-260g per cup (6% band).
Why this happens: temperature and fat phase (solid vs softened vs melted) change effective volume.
Common Questions
Can I use regular milk instead of buttermilk?
Not directly. The closest substitute is milk plus an acid such as lemon juice or vinegar.
Why does buttermilk matter so much with baking soda?
Its acidity activates baking soda, which helps the batter rise and brown properly.
Can buttermilk be frozen for baking?
Yes. It freezes well for baking use, though it may separate visually when thawed.
How many grams is 1 cup of buttermilk?
1 cup of buttermilk weighs 245 grams.