Convert Buttermilk from Cup to Fluid Ounces

How many fluid ounces is 1 cup of buttermilk?

1 cup of buttermilk (cultured buttermilk) is 8.45 fluid ounces. 2 cups of buttermilk is 16.91 fluid ounces. 1/2 cup of buttermilk is 4.23 fluid ounces. 1/4 cup (0.25 cup) of buttermilk is 2.11 fluid ounces. Use the converter below for any amount.

  • These figures use the metric cup (250 ml). A US cup is slightly smaller at 240 ml, so it holds a little less. Use the US cup converter →
  • Cup sizes are not standard worldwide, so the same cup of an ingredient can weigh more or less depending on the country. What is a cup measurement →

Buttermilk is a tangy, slightly acidic dairy liquid used in pancakes, cakes, quick breads, and marinades. One metric cup (250 ml) weighs 255 g (8.99 oz). Despite its name, it contains very little butter: modern buttermilk is made by culturing low-fat milk with bacterial cultures.

Recipes often call for buttermilk by volume, but measuring by weight gives more consistent results, especially when scaling. This page converts buttermilk between grams, cups, millilitres, fluid ounces, and more.

Also known as

  • cultured buttermilk
  • sour milk

Buttermilk Calculator

Out of buttermilk? Calculate the exact milk plus lemon juice or white vinegar to mix as a substitute.

Buttermilk Substitute Calculator

Milk is thinner and less acidic than buttermilk. To substitute, stir 1 tablespoon of lemon juice or white vinegar into 1 cup of milk, then let it sit for a few minutes until it curdles slightly. See our Milk converter.

Lemon juice stirred into regular milk makes a quick buttermilk substitute. Use 1 tablespoon of lemon juice per 1 cup of milk, stir, and let it curdle for a few minutes before using. See our Lemon Juice converter.

Plain yoghurt is thicker than buttermilk but shares the tang and acidity. To use yoghurt in place of buttermilk, stir 2 to 3 tablespoons of milk into 1 cup of yoghurt to match the pourable texture. See our Plain Yoghurt converter.

Sour cream is thick and spoonable, while buttermilk is thin and pourable. To use sour cream in place of buttermilk, thin it with milk in a 3:1 ratio until pourable; the tang and acidity stay close. See our Sour Cream converter.

Out of buttermilk? See buttermilk substitutes →

No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.

Buttermilk Measurement Converter

Enter a value and pick your units.

Result

0 Fluid Ounces

Common Buttermilk Conversions

Here are the most common buttermilk conversions from cups to fluid Ounces.

CupsFluid Ounces
0.25 cups2.11 fl oz
0.5 cups4.23 fl oz
0.75 cups6.34 fl oz
1 cup8.45 fl oz
1.25 cups10.57 fl oz
1.5 cups12.68 fl oz
2 cups16.91 fl oz
2.5 cups21.14 fl oz
3 cups25.36 fl oz

Buttermilk Conversion Chart

The conversion chart below gives a quick reference for converting buttermilk from Cup to Fluid Ounces and other measurements.

cupfl ozgramsouncescup(US)tbsptspml
0.25 cup2.11 fl oz63.75 g2.25 oz0.26 cup (US)4.17 tbsp12.5 tsp62.5 ml
0.5 cup4.23 fl oz127.5 g4.5 oz0.52 cup (US)8.33 tbsp25 tsp125 ml
1 cup8.45 fl oz255 g8.99 oz1.04 cup (US)16.67 tbsp50 tsp250 ml
2 cup16.91 fl oz510 g17.98 oz2.08 cup (US)33.33 tbsp100 tsp500 ml

Frequently Asked Questions

How many fluid ounces is 1 cup of buttermilk?
1 cup of buttermilk is 8.45 fluid ounces. The ratio is fixed, so 2 cups of buttermilk is 16.91 fluid ounces and 0.5 cups is 4.23 fluid ounces. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the buttermilk converter
How many fluid ounces is 1.5 cups of buttermilk?
1.5 cups of buttermilk is 12.68 fluid ounces. The ratio is fixed, so 1 cup of buttermilk is 8.45 fluid ounces and 2 cups is 16.91 fluid ounces. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
How many fluid ounces is 2 cups of buttermilk?
2 cups of buttermilk is 16.91 fluid ounces. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 cup of buttermilk is 8.45 fluid ounces, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact fluid ounces reading.
How many cups of buttermilk is 8.45 fluid ounces?
8.45 fluid ounces of buttermilk is 1 cup. The conversion works the same in reverse, so you can switch between fluid ounces and cups without changing the result. This helps when a recipe lists cups but you would rather weigh or measure in fluid ounces. The converter above and the chart below cover both directions for any amount.
How many fluid ounces is 1 cup of cultured buttermilk?
Cultured buttermilk is another name for buttermilk, so 1 cup of cultured buttermilk is 8.45 fluid ounces, exactly the same as buttermilk. The figure does not change with the name: 2 cups is 16.91 fluid ounces and 0.5 cups is 4.23 fluid ounces. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.
Are buttermilk and cultured buttermilk the same thing?
Yes. Cultured buttermilk is another name for buttermilk, so they are the same ingredient and convert identically. 1 cup of buttermilk is 8.45 fluid ounces under either name, and 2 cups is 16.91 fluid ounces. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.
What is 1/2 cup buttermilk in fluid ounces?
1/2 cup of buttermilk is 4.23 fluid ounces. The ratio is fixed, so 1 cup of buttermilk is 8.45 fluid ounces and 2 cups is 16.91 fluid ounces. Half measures come up often when scaling a recipe down, and the figure divides cleanly. Use the converter above for any other amount, or the chart below for the common ones.
What is 1/4 cup buttermilk in fluid ounces?
1/4 cup (0.25 cup) of buttermilk is 2.11 fluid ounces. The ratio is fixed, so 1 cup of buttermilk is 8.45 fluid ounces and 2 cups is 16.91 fluid ounces. Quarter amounts often come up when scaling a recipe down step by step, and the figure divides cleanly. Use the converter above for any other quantity, or the chart below for the most common amounts.

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