Buttermilk — Measurement Converter
1 cup of buttermilk weighs about 245 g. Half a cup is 123 g, a tablespoon about 15.3 g, and a full cup is 8.64 ounces on a scale.
💡 Tip: Shake well and measure to the line — buttermilk separates as it sits
Buttermilk by weight: grams to cups
| Grams | Amount | Ounces |
|---|---|---|
| 50 | 1/4 cup | 1.76 |
| 100 | 3/8 cup | 3.53 |
| 113 | 1/2 cup | 3.99 |
| 150 | 5/8 cup | 5.29 |
| 170 | 2/3 cup | 6 |
| 200 | 7/8 cup | 7.05 |
| 225 | 7/8 cup | 7.94 |
| 250 | 1 cup | 8.82 |
| 300 | 1 1/4 cups | 10.6 |
| 400 | 1 5/8 cups | 14.1 |
| 500 | 2 cups | 17.6 |
How to make a buttermilk substitute
No buttermilk on hand? Make a quick stand-in: stir 1 tablespoon of lemon juice or white vinegar into 1 cup of regular milk, then let it rest 5–10 minutes until it thickens and curdles slightly. It won't be as rich as cultured buttermilk but works in almost any baking recipe. A cup of buttermilk weighs about 245 g — a touch heavier than milk because of its body. Always shake the carton and measure to the line, since buttermilk separates as it sits.
Buttermilk cup measurements, in grams
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 | 61.3 | 2.16 |
| 1/3 | 81.7 | 2.88 |
| 1/2 | 123 | 4.32 |
| 2/3 | 163 | 5.76 |
| 3/4 | 184 | 6.48 |
| 1 | 245 | 8.64 |
| 1 1/4 | 306 | 10.8 |
| 1 1/2 | 368 | 13 |
| 2 | 490 | 17.3 |
For smaller amounts: a tablespoon of buttermilk is about 15.3 g, and a teaspoon about 5.1 g.
How buttermilk compares with other liquids & dairy
A cup of buttermilk weighs 245 g, which puts it 13th by weight among the 14 liquids & dairy on this site. Its nearest neighbours are egg whites at 243 g and greek yogurt at 250 g per cup.
That gap matters when you substitute by volume: use a cup of greek yogurt where the recipe wanted buttermilk and you have added about 5 g extra — 2% more than intended. Weighing instead of scooping removes the problem.
Frequently asked questions
- How many cups is 100g of buttermilk?
- 100 grams of buttermilk is about 3/8 cup.
- How many grams is 2 cups of buttermilk?
- About 490 g, at roughly 245 g per cup.
- How many cups is 150g of buttermilk?
- Around ⅝ of a cup.
- Can I substitute buttermilk for regular milk?
- Yes, but it's acidic, so in recipes with baking soda it adds extra lift. For straight swaps in non-baking uses, plain milk is fine.
- What can I use instead of buttermilk?
- Mix 1 cup milk with 1 tablespoon lemon juice or vinegar and rest 5–10 minutes; thinned plain yogurt or kefir also work well.
- How many cups are in a pint of buttermilk?
- A US pint is 2 cups, so about 490 g of buttermilk.
- How many grams is 1 cup of buttermilk?
- Reckon on 245 grams per US cup of buttermilk — about 8.64 ounces.
- How many ounces is 1 cup of buttermilk?
- About 8.64 oz. Note that is weight, not fluid ounces — a cup is always 8 fl oz whatever is in it.
- How many grams is a tablespoon of buttermilk?
- 1 tablespoon of buttermilk is about 15.3 grams (a teaspoon is roughly 5.1 g).