3/4 Cup Buttermilk in Grams
3/4 cup of buttermilk weighs 183.8 g (poured, USDA). Tangy cultured milk that tenderises batters and activates baking soda. All the figures on this page are approximate conversions based on the USDA value of 245 g per cup, so when a recipe really matters, verify with a kitchen scale.
It is used for pancakes, biscuits, fried chicken and ranch dressing. That range of uses is part of why the conversion comes up so often: the same ingredient appears in everyday cooking and in precise baking, and the two situations demand different levels of accuracy. Knowing the weight of 3/4 cup, rather than guessing from a measuring cup, keeps the result consistent no matter which recipe you are following, and it lets you scale a recipe up or down without the errors multiplying.
Buttermilk cups to grams conversion table
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 61.2 g |
| 1/3 cup | 81.7 g |
| 1/2 cup | 122.5 g |
| 2/3 cup | 163.3 g |
| 3/4 cup | 183.8 g |
| 1 cup | 245 g |
| 1 1/4 cups | 306.2 g |
| 1 1/2 cups | 367.5 g |
| 2 cups | 490 g |
| 3 cups | 735 g |
One tablespoon of buttermilk weighs about 15.3 g, and one teaspoon about 5.1 g. Three quarters of a cup is 12 tablespoons, and it occupies about 177 ml by volume, the same as 3/4 cup of anything, because volume does not change from one ingredient to the next. Only the weight changes, and that is why the table above is organised by weight rather than volume. The table is rounded to the nearest tenth of a gram where the fraction demands it, so the numbers are approximate by design; the 3/4 cup figure of 183.8 g is the one to use when a recipe calls for 3/4 cup.
How the weight was measured
Poured is the method used for this ingredient, and it matters because the same cup can hold a different weight depending on how it was filled. Spooned and levelled means spooning the ingredient into the cup and levelling the top with a straight knife, without packing it down. Packed means pressing the ingredient firmly into the cup until it holds its shape. Poured means pouring a liquid into a measuring jug up to the line. Scooped means pushing the cup through a solid fat and levelling the top.
The source for the 245 g per cup figure is USDA, and this page follows that value exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
USDA lists cultured buttermilk at about 245 g per cup; King Arthur rounds it to 227 g.
All the figures on this page are approximate conversions. When a recipe really matters, verify with a kitchen scale: weigh the ingredient directly into the bowl on a tared scale and trust that number over any cup.
Worked examples
Buttermilk pancakes on a Saturday morning
A pancake recipe calling for 3/4 cup of buttermilk needs 183.8 g. Buttermilk does two jobs in pancakes: its acid activates the baking soda for lift, and it tenderises the crumb so the pancakes stay soft. Weighing 183.8 g matters because the acid-to-soda balance is precise; too much buttermilk makes the pancakes tangy and damp, too little leaves them flat and soapy-tasting from unreacted soda.
A fried chicken marinade overnight
A fried chicken marinade that uses 3/4 cup of buttermilk needs 183.8 g, poured over the chicken pieces in a bowl. The acid and the enzymes in buttermilk tenderise the meat gently overnight without turning it mushy the way vinegar would. Weighing the buttermilk keeps the marinade ratio right when you scale up to a whole chicken cut into pieces for a crowd.
A batch of buttermilk biscuits, halved
Halving a biscuit recipe that asks for 1 1/2 cups of buttermilk leaves 3/4 cup, or 183.8 g. Biscuits are the recipe where buttermilk earns its keep: the acid reacts with the soda for lift, and the tang balances the rich butter. Weighing the halved amount keeps the smaller batch rising as high as the original, instead of turning out flat and pale.
Why weighing 3/4 cup of buttermilk beats measuring it in cups
Dairy is the ingredient that sets the moisture and the richness of a recipe, and 3/4 cup is an amount that appears in cakes, sauces, and soups all the time. Weighing it matters because dairy varies in thickness: milk pours freely, while sour cream and cream cheese are thick enough to trap air in a cup. A cup measure can be 10 g or more off, which is enough to change a cake from moist to dry or a sauce from silky to thin. Weighing removes that whole source of error, and it is faster than spooning a thick dairy into a cup and levelling it.
When this conversion matters most
This conversion matters most in baking with baking soda, where buttermilk is not just a liquid but a chemical ingredient. Its acid activates the soda, and the ratio between the two decides whether the bake rises properly or tastes soapy. Buttermilk weighs 245 g per cup, so 3/4 cup is 183.8 g, only a gram more than the same volume of milk, but the acid makes all the difference in the result. It also matters in fried chicken, where the marinade tenderises the meat, and in dressings, where the tang is the point. For drinking, the exact weight is irrelevant.
Storage
Refrigerate; use within 2 weeks. Tangy cultured milk that tenderises batters and activates baking soda. It is used for pancakes, biscuits, fried chicken and ranch dressing. Knowing how the ingredient is stored matters for the conversion too: an ingredient that has absorbed moisture or dried out will weigh differently per cup, so store it properly and weigh it fresh for the best results.
Common mistakes
The most common mistake is swapping plain milk for buttermilk without adding acid. Plain milk will not activate baking soda, so the bake rises poorly and can taste soapy. A second mistake is using the King Arthur rounded figure of 227 g per cup, which gives 170.2 g for 3/4 cup, about 14 g light; the USDA value of 245 g per cup is the reliable one. A third mistake is shaking the carton and pouring straight from it without checking the date: buttermilk keeps for two weeks in the fridge, but old buttermilk turns bitter and can spoil a whole batch.
If you do not have a kitchen scale, the most reliable fallback is the tablespoon: 3/4 cup is 12 level tablespoons, and each one is levelled on its own, so the errors do not stack the way they do in a cup. Spoon dry ingredients in and level them off, and pour liquids in on a flat surface so the spoon is full but not heaped. It takes a minute longer than weighing, but it beats guessing from a cup, and for a dressing or a marinade it is accurate enough. For cakes and pastry, buy a scale when you can: it is the single cheapest upgrade to your baking.
Frequently asked questions
How many grams is 3/4 cup of buttermilk?
3/4 cup of buttermilk weighs 183.8 g, poured, using the USDA value of 245 g per cup. The figure is approximate, so verify with a kitchen scale when the recipe matters, especially for baking with baking soda.
How do I make buttermilk from milk?
Stir one tablespoon of lemon juice or white vinegar into 183 g of milk and rest it for five minutes until it curdles slightly. That gives you a buttermilk substitute for 3/4 cup. It works for the acid, though the flavour is milder than real cultured buttermilk.
How many tablespoons is 3/4 cup of buttermilk?
3/4 cup is 12 tablespoons, and one tablespoon of buttermilk weighs about 15 g. That gives roughly 183.8 g for the full 12 tablespoons. Weighing the buttermilk into the bowl is more accurate than counting spoonfuls.
Why does buttermilk make pancakes fluffier?
Buttermilk is acidic, and its acid reacts with baking soda to release carbon dioxide, which lifts the batter. It also tenderises the flour, so the crumb stays soft. That is why pancake recipes specify buttermilk rather than plain milk, and why the 183.8 g amount matters.
Can I use yogurt instead of buttermilk?
Yes, thinned with a little water: yogurt weighs 245 g per cup, the same as buttermilk, so 3/4 cup is 183.8 g. Thin thick yogurt with a tablespoon or two of water so it pours like buttermilk, and the acid will activate baking soda in the same way.