Milligrams to Fluid Ounces Conversion Calculator
Enter the weight in milligrams below to calculate the volume in fluid ounces.
Result: Fluid Ounces
Do you want to convert fluid ounces to milligrams?
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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
Milligram to Fluid Ounce Conversion Table
| Weight in Milligrams: | Volume in Fluid Ounces of: | ||||
|---|---|---|---|---|---|
| Water | Milk | Cooking Oil | All Purpose Flour | Granulated Sugar | |
| 100 mg | 0.003 fl oz | 0.003 fl oz | 0.004 fl oz | 0.006 fl oz | 0.004 fl oz |
| 200 mg | 0.007 fl oz | 0.007 fl oz | 0.008 fl oz | 0.013 fl oz | 0.008 fl oz |
| 300 mg | 0.01 fl oz | 0.01 fl oz | 0.012 fl oz | 0.019 fl oz | 0.012 fl oz |
| 400 mg | 0.014 fl oz | 0.013 fl oz | 0.015 fl oz | 0.026 fl oz | 0.016 fl oz |
| 500 mg | 0.017 fl oz | 0.016 fl oz | 0.019 fl oz | 0.032 fl oz | 0.02 fl oz |
| 600 mg | 0.02 fl oz | 0.02 fl oz | 0.023 fl oz | 0.038 fl oz | 0.024 fl oz |
| 700 mg | 0.024 fl oz | 0.023 fl oz | 0.027 fl oz | 0.045 fl oz | 0.028 fl oz |
| 800 mg | 0.027 fl oz | 0.026 fl oz | 0.031 fl oz | 0.051 fl oz | 0.032 fl oz |
| 900 mg | 0.03 fl oz | 0.03 fl oz | 0.035 fl oz | 0.058 fl oz | 0.036 fl oz |
| 1,000 mg | 0.034 fl oz | 0.033 fl oz | 0.038 fl oz | 0.064 fl oz | 0.04 fl oz |
| 1,100 mg | 0.037 fl oz | 0.036 fl oz | 0.042 fl oz | 0.07 fl oz | 0.044 fl oz |
| 1,200 mg | 0.041 fl oz | 0.039 fl oz | 0.046 fl oz | 0.077 fl oz | 0.048 fl oz |
| 1,300 mg | 0.044 fl oz | 0.043 fl oz | 0.05 fl oz | 0.083 fl oz | 0.052 fl oz |
| 1,400 mg | 0.047 fl oz | 0.046 fl oz | 0.054 fl oz | 0.089 fl oz | 0.056 fl oz |
| 1,500 mg | 0.051 fl oz | 0.049 fl oz | 0.058 fl oz | 0.096 fl oz | 0.06 fl oz |
| 1,600 mg | 0.054 fl oz | 0.053 fl oz | 0.061 fl oz | 0.102 fl oz | 0.064 fl oz |
| 1,700 mg | 0.057 fl oz | 0.056 fl oz | 0.065 fl oz | 0.109 fl oz | 0.068 fl oz |
| 1,800 mg | 0.061 fl oz | 0.059 fl oz | 0.069 fl oz | 0.115 fl oz | 0.072 fl oz |
| 1,900 mg | 0.064 fl oz | 0.062 fl oz | 0.073 fl oz | 0.121 fl oz | 0.076 fl oz |
| 2,000 mg | 0.068 fl oz | 0.066 fl oz | 0.077 fl oz | 0.128 fl oz | 0.08 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.
References
- National Institute of Standards & Technology, Culinary Measurement Tips, https://www.nist.gov/pml/owm/culinary-measurement-tips
- CK-12 Foundation, Introductory Chemistry (CK-12) - 12.6: Mass-Volume Stoichiometry, https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/12%3A_Stoichiometry/12.06%3A_Mass-Volume_Stoichiometry
- U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures