Liquids
Convert cups of buttermilk to ounces
One cup of buttermilk weighs about 8.64 oz, and half a cup comes to roughly 4.32 oz. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 cup of buttermilk =
8.64 oz
- kg
- 0.245
- lb
- 0.54
Buttermilk: 245 g per US cup · USDA FoodData Central. Cultured buttermilk is thicker than milk but almost identical in weight per cup.
Full buttermilk chart →Buttermilk at a glance
Every number on this page comes from a single figure: 245 grams per US cup (USDA FoodData Central).
- 1 cup
- 245 g
- 1 tablespoon
- 15.3 g
- 1 teaspoon
- 5.1 g
- 1 cup in ounces
- 8.64 oz
- 100 g in cups
- 0.408 cups
- Density
- 1.04 g/ml
cups to ounces chart for buttermilk
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Cups (US) | Grams | Ounces (weight) | Pounds |
|---|---|---|---|
| 1/8 cup | 30.6 g | 1.08 oz | 0.068 lb |
| 1/4 cup | 61.3 g | 2.16 oz | 0.135 lb |
| 1/3 cup | 81.7 g | 2.88 oz | 0.18 lb |
| 1/2 cup | 123 g | 4.32 oz | 0.27 lb |
| 2/3 cup | 163 g | 5.76 oz | 0.36 lb |
| 3/4 cup | 184 g | 6.48 oz | 0.405 lb |
| 1 cup | 245 g | 8.64 oz | 0.54 lb |
| 1 1/2 cup | 368 g | 13 oz | 0.81 lb |
| 2 cup | 490 g | 17.3 oz | 1.08 lb |
| 3 cup | 735 g | 25.9 oz | 1.62 lb |
| 4 cup | 980 g | 34.6 oz | 2.16 lb |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat buttermilk as 245 g per US customary cup, which works out to 1.036 g/ml. From there:
- Your cups figure is converted into millilitres or grams using standard unit sizes (cup = 237 ml).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 3/8 cups.
Measuring buttermilk accurately
Cultured buttermilk is thicker than milk but almost identical in weight per cup.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many ounces are in 1 cup of buttermilk?
1 cup of buttermilk is 8.64 oz. This is based on a density of 245 g per US cup.
How many ounces are in 2 cups of buttermilk?
2 cups of buttermilk is 17.3 oz, and 4.32 oz for half a cup.
How much is 100 g of buttermilk in cups?
100 g of buttermilk is about 3/8 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for buttermilk?
Cultured buttermilk is thicker than milk but almost identical in weight per cup.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.