Milligrams to Fluid Ounces Conversion Calculator

Enter the weight in milligrams below to calculate the volume in fluid ounces.

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1 mg = 3.3814E-5 fl oz

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How to Convert Milligrams to Fluid Ounces

Since milligrams are a unit of mass and fluid ounces are a unit of volume, which are different physical quantities, we need to know one more physical quantity of the ingredient or substance to convert between them. In this case, we need to account for the density of the substance whenever we do a conversion.

Therefore, to convert between milligrams and fluid ounces of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion.

Milligrams to Fluid Ounces Formula

To convert a measurement in milligrams to fluid ounces, divide the weight by the density of the ingredient or material. Note that in order for this to work, the density must be in milligrams per fluid ounce (mg/fl oz).

If the density is given in grams per milliliter (g/mL), then first multiply the density by 29,573.53 to convert to mg/fl oz.

For a density given in g/mL, you can use this simple formula to convert:

fluid ounces = milligrams / 29,573.53 × density

Thus, the volume in fluid ounces is equal to the weight in milligrams divided by 29,573.53 times the density (in g/mL) of the ingredient, substance, or material.

For example, here's how to convert 50,000 milligrams to fluid ounces for an ingredient with a density of 0.7 g/mL.
fluid ounces = 50,000 mg / 29,573.53 × 0.7 g/mL = 2.4153 fl oz

When to Convert Milligrams to Fluid Ounces

Milligrams and fluid 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 and clumping.

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 weight to volume conversion.

Another useful application of weight and volume conversions is chemistry. When performing chemical reactions by combining separate chemicals to produce a new chemical, one must know the exact amount of each chemical to add in order to maximize the yield of the reaction.

It is common to mix powdered chemicals with liquid, or aqueous, chemicals, and this is where it becomes very useful to convert between weights and volumes.[2]

Keep reading to learn more about each unit of measure.

What is a Milligram?

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

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

A milligram is frequently referred to as a unit of weight. While technically, a milligram is a measure of mass, and weight is actually a measure of force, the two are equivalent as long as we are performing our calculations on Earth.

For example, an object with a mass of 1 milligram weighs 1 milligram on Earth, but only weighs one-sixth of that on the moon, yet still has the same mass.

Learn more about milligrams.

What is a Fluid Ounce?

The US fluid ounce is a unit of volume equal to 1/16 of a pint or 1/8 of a cup. The fluid ounce is sometimes referred to as just an "ounce" but should not be confused with the unit of weight. One fluid ounce is equal to approximately 29.5735 milliliters, but in nutrition labeling, one fluid ounce is rounded to exactly 30 milliliters.[3]

The fluid ounce is a US customary unit of volume. Fluid ounces can be abbreviated as fl oz, and are also sometimes abbreviated as oz fl. For example, 1 fluid ounce can be written as 1 fl oz or 1 oz fl.

Learn more about fluid ounces.

Milligram to Fluid Ounce Conversion Table

Milligram measurements converted to fluid ounces for commonly used cooking and baking ingredients.
Weight in Milligrams: Volume in Fluid Ounces of:
Water Milk Cooking Oil All Purpose Flour Granulated Sugar
100 mg 0.003381 fl oz 0.003283 fl oz 0.003843 fl oz 0.006392 fl oz 0.004 fl oz
200 mg 0.006763 fl oz 0.006566 fl oz 0.007685 fl oz 0.012784 fl oz 0.008 fl oz
300 mg 0.010144 fl oz 0.009849 fl oz 0.011528 fl oz 0.019176 fl oz 0.012 fl oz
400 mg 0.013526 fl oz 0.013132 fl oz 0.01537 fl oz 0.025568 fl oz 0.016 fl oz
500 mg 0.016907 fl oz 0.016415 fl oz 0.019213 fl oz 0.03196 fl oz 0.02 fl oz
600 mg 0.020288 fl oz 0.019697 fl oz 0.023055 fl oz 0.038352 fl oz 0.024 fl oz
700 mg 0.02367 fl oz 0.02298 fl oz 0.026898 fl oz 0.044744 fl oz 0.028 fl oz
800 mg 0.027051 fl oz 0.026263 fl oz 0.03074 fl oz 0.051137 fl oz 0.032 fl oz
900 mg 0.030433 fl oz 0.029546 fl oz 0.034583 fl oz 0.057529 fl oz 0.036 fl oz
1,000 mg 0.033814 fl oz 0.032829 fl oz 0.038425 fl oz 0.063921 fl oz 0.04 fl oz
1,100 mg 0.037195 fl oz 0.036112 fl oz 0.042268 fl oz 0.070313 fl oz 0.044 fl oz
1,200 mg 0.040577 fl oz 0.039395 fl oz 0.04611 fl oz 0.076705 fl oz 0.048 fl oz
1,300 mg 0.043958 fl oz 0.042678 fl oz 0.049953 fl oz 0.083097 fl oz 0.052 fl oz
1,400 mg 0.04734 fl oz 0.045961 fl oz 0.053795 fl oz 0.089489 fl oz 0.056 fl oz
1,500 mg 0.050721 fl oz 0.049244 fl oz 0.057638 fl oz 0.095881 fl oz 0.06 fl oz
1,600 mg 0.054102 fl oz 0.052527 fl oz 0.06148 fl oz 0.102273 fl oz 0.064 fl oz
1,700 mg 0.057484 fl oz 0.05581 fl oz 0.065323 fl oz 0.108665 fl oz 0.068 fl oz
1,800 mg 0.060865 fl oz 0.059092 fl oz 0.069165 fl oz 0.115057 fl oz 0.072 fl oz
1,900 mg 0.064247 fl oz 0.062375 fl oz 0.073008 fl oz 0.121449 fl oz 0.076 fl oz
2,000 mg 0.067628 fl oz 0.065658 fl oz 0.07685 fl oz 0.127841 fl oz 0.08 fl oz
2,100 mg 0.071009 fl oz 0.068941 fl oz 0.080693 fl oz 0.134233 fl oz 0.084 fl oz
2,200 mg 0.074391 fl oz 0.072224 fl oz 0.084535 fl oz 0.140625 fl oz 0.088 fl oz
2,300 mg 0.077772 fl oz 0.075507 fl oz 0.088378 fl oz 0.147017 fl oz 0.092 fl oz
2,400 mg 0.081154 fl oz 0.07879 fl oz 0.09222 fl oz 0.15341 fl oz 0.096 fl oz
2,500 mg 0.084535 fl oz 0.082073 fl oz 0.096063 fl oz 0.159802 fl oz 0.1 fl oz
2,600 mg 0.087916 fl oz 0.085356 fl oz 0.099905 fl oz 0.166194 fl oz 0.104 fl oz
2,700 mg 0.091298 fl oz 0.088639 fl oz 0.103748 fl oz 0.172586 fl oz 0.108 fl oz
2,800 mg 0.094679 fl oz 0.091922 fl oz 0.10759 fl oz 0.178978 fl oz 0.112 fl oz
2,900 mg 0.098061 fl oz 0.095205 fl oz 0.111433 fl oz 0.18537 fl oz 0.116 fl oz
3,000 mg 0.101442 fl oz 0.098487 fl oz 0.115275 fl oz 0.191762 fl oz 0.12 fl oz
3,100 mg 0.104823 fl oz 0.10177 fl oz 0.119118 fl oz 0.198154 fl oz 0.124 fl oz
3,200 mg 0.108205 fl oz 0.105053 fl oz 0.12296 fl oz 0.204546 fl oz 0.128 fl oz
3,300 mg 0.111586 fl oz 0.108336 fl oz 0.126803 fl oz 0.210938 fl oz 0.132 fl oz
3,400 mg 0.114968 fl oz 0.111619 fl oz 0.130645 fl oz 0.21733 fl oz 0.136 fl oz
3,500 mg 0.118349 fl oz 0.114902 fl oz 0.134488 fl oz 0.223722 fl oz 0.14 fl oz
3,600 mg 0.12173 fl oz 0.118185 fl oz 0.13833 fl oz 0.230114 fl oz 0.144 fl oz
3,700 mg 0.125112 fl oz 0.121468 fl oz 0.142173 fl oz 0.236506 fl oz 0.148 fl oz
3,800 mg 0.128493 fl oz 0.124751 fl oz 0.146015 fl oz 0.242898 fl oz 0.152 fl oz
3,900 mg 0.131875 fl oz 0.128034 fl oz 0.149858 fl oz 0.249291 fl oz 0.156 fl oz
4,000 mg 0.135256 fl oz 0.131317 fl oz 0.1537 fl oz 0.255683 fl oz 0.16 fl oz


  1. National Institute of Standards & Technology, Metric Cooking Resources,
  2. CK-12 Foundation, Introductory Chemistry (CK-12) - 12.6: Mass-Volume Stoichiometry,
  3. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures,

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