Cups to Ounces Conversion Calculator

Enter the volume in cups below to calculate the weight in ounces.

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1 c = 8.345404451487 oz
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How to Convert Cups to Ounces

To convert a cup measurement to an ounce measurement, multiply the volume by 8.345404 times the density of the ingredient or material.

You can use this simple formula to convert:

ounces = cups × 8.345404 × ingredient density

Thus, the volume in ounces is equal to the cups multiplied by 8.345404 times the density of the ingredient or material.

For example, here's how to convert 5 cups to ounces for an ingredient with a density of 0.7 g/mL.
5 c = 5 × 8.345404 × 0.7 = 29.208916 oz

This calculator converts to ounces in weight, if you're trying to convert to a volume measurement in fluid ounces try our cups to fluid ounces calculator.

Cups and ounces are both commonly used to measure cooking ingredients.

For cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements.[1] The density of dry ingredients can vary for a variety of reasons, such as compaction.

The best way to ensure an accurate conversion is to use a scale. When a scale is not available, a calculator like the one above is a good way to estimate the volume to weight conversion.

For cooking and baking ingredients, you can get more specific results using our butter, flour, sugar conversion calculators.

Keep reading to learn more about each unit of measure.

How Many Ounces are in a Cup?

The actual weight of a cup will vary depending on the density of the material. The table below shows how many ounces of various wet and dry ingredients are in a cup.

Cup measurements converted to ounces for commonly used ingredients.
Volume in Cups: Weight in Ounces of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
1/8 c 1.0432 oz 1.0745 oz 0.917994 oz 0.55184 oz 0.881849 oz
1/4 c 2.0864 oz 2.1489 oz 1.836 oz 1.1037 oz 1.7637 oz
1/3 c 2.7818 oz 2.8653 oz 2.448 oz 1.4716 oz 2.3516 oz
1/2 c 4.1727 oz 4.2979 oz 3.672 oz 2.2074 oz 3.5274 oz
2/3 c 5.5636 oz 5.7305 oz 4.896 oz 2.9431 oz 4.7032 oz
3/4 c 6.2591 oz 6.4468 oz 5.508 oz 3.311 oz 5.2911 oz
1 c 8.3454 oz 8.5958 oz 7.344 oz 4.4147 oz 7.0548 oz


The cup is a unit of volume equal to 16 tablespoons or 8 fluid ounces. The cup should not be confused with the metric cup or the teacup, which are different units of volume. One cup is equal to just under 236.6 milliliters, but in nutrition labeling, one cup is equal to 240 milliliters.[2]

The cup is a US customary unit of volume. Cups can be abbreviated as c, and are also sometimes abbreviated as C. For example, 1 cup can be written as 1 c or 1 C.


One ounce is a unit of mass/weight equal to 1/16 of a pound. The common ounce should not be confused with the troy ounce, which is equal to 1/12 of a troy pound.[3]

The ounce is a US customary and imperial unit of weight. Ounces can be abbreviated as oz; for example, 1 ounce can be written as 1 oz.


  1. National Institute of Standards & Technology, Metric Cooking Resources,
  2. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures,
  3. James Bucki, Troy Ounce vs. Ounce, The Spruce,

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