Liquids
Convert ounces of buttermilk to cups
One ounce of buttermilk weighs about 0.116 cup, and half a ounce comes to roughly 0.058 cup. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 oz of buttermilk =
0.116 cup
About 1/8 cup in recipe notation
- ml
- 27.4
- tbsp
- 1.85
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
ounces to cups chart for buttermilk
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Ounces (weight) | Cups (US) | Tablespoons (US) | Millilitres |
|---|---|---|---|
| 0.5 oz | 0.058 cup | 0.926 tbsp | 13.7 ml |
| 1 oz | 0.116 cup | 1.85 tbsp | 27.4 ml |
| 2 oz | 0.231 cup | 3.7 tbsp | 54.8 ml |
| 3 oz | 0.347 cup | 5.55 tbsp | 82.1 ml |
| 4 oz | 0.463 cup | 7.41 tbsp | 110 ml |
| 5 oz | 0.579 cup | 9.26 tbsp | 137 ml |
| 6 oz | 0.694 cup | 11.1 tbsp | 164 ml |
| 8 oz | 0.926 cup | 14.8 tbsp | 219 ml |
| 12 oz | 1.39 cup | 22.2 tbsp | 329 ml |
| 16 oz | 1.85 cup | 29.6 tbsp | 438 ml |
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 ounces figure is converted into millilitres or grams using standard unit sizes (oz = 28.3 g).
- 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 cups are in 1 ounce of buttermilk?
1 ounce of buttermilk is 0.116 cup. This is based on a density of 245 g per US cup.
How many cups are in 2 ounces of buttermilk?
2 ounces of buttermilk is 0.231 cup, and 0.058 cup for half a ounce.
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.