Cups to Milligrams Conversion Calculator

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

Results in Milligrams:
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1 c = 236,588.23648491 mg
236.588236 g
Do you want to convert milligrams to cups?

How to Convert Cups to Milligrams

To convert a cup measurement to a milligram measurement, multiply the volume by 236,588.23648 times the density of the ingredient or material.

You can use this simple formula to convert:

milligrams = cups × 236,588.23648 × ingredient density

Thus, the volume in milligrams is equal to the cups multiplied by 236,588.23648 times the density of the ingredient or material.

For example, here's how to convert 5 cups to milligrams for an ingredient with a density of 0.7 g/mL.
5 c = 5 × 236,588.23648 × 0.7 = 828,058.8277 mg

Cups and milligrams 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.

Keep reading to learn more about each unit of measure.

How Many Milligrams 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 milligrams of various wet and dry ingredients are in a cup.

Cup measurements converted to milligrams for commonly used ingredients.
Volume in Cups: Weight in Milligrams of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
1/8 c 29,574 mg 30,461 mg 26,025 mg 15,644 mg 25,000 mg
1/4 c 59,147 mg 60,921 mg 52,049 mg 31,289 mg 50,000 mg
1/3 c 78,863 mg 81,229 mg 69,399 mg 41,718 mg 66,667 mg
1/2 c 118,294 mg 121,843 mg 104,099 mg 62,578 mg 100,000 mg
2/3 c 157,725 mg 162,457 mg 138,798 mg 83,437 mg 133,333 mg
3/4 c 177,441 mg 182,764 mg 156,148 mg 93,866 mg 150,000 mg
1 c 236,588 mg 243,686 mg 208,198 mg 125,155 mg 200,000 mg


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.


The milligram is the mass equal to 1/1,000 of a gram, or 0.0154 grains.

The milligram, or milligramme, is an SI unit of weight in the metric system. In the metric system, "milli" is the prefix for 10-3. Milligrams can be abbreviated as mg; for example, 1 milligram can be written as 1 mg.


  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,

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