mg to mL Conversion (Milligrams to Milliliters)
Enter the weight in milligrams below to calculate the volume in milliliters.
Result: Milliliters
Do you want to convert milliliters to milligrams?
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How to Convert Milligrams to Milliliters
Since milligrams are a unit of mass and milliliters are a unit of volume, which are different physical quantities, we need to know one more physical quantity of the 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 milliliters of an substance, medication, drug, or ingredient, we must either multiply or divide by its density, depending on which direction we are performing the conversion.
Milligrams to Milliliters Formula
To convert a measurement in milligrams to milliliters, 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 milliliter (mg/mL).
If the density is given in grams per milliliter (g/mL), then first multiply the density by 1,000 to convert to mg/mL.
For a density given in g/mL, you can use this simple formula to convert:
milliliters = milligrams / 1,000 × density
Thus, the volume in milliliters is equal to the weight in milligrams divided by 1,000 times the density (in g/mL) of the ingredient, substance, or material.
For example, here's how to convert 500 milligrams to milliliters for an ingredient with a density of 0.7 g/mL.
milliliters = 500 mg / 1,000 × 0.7 g/mL = 0.7143 mL
Milligram to Milliliter Conversion Table
| Weight in Milligrams: | Volume in Milliliters of: | ||||
|---|---|---|---|---|---|
| Water | Milk | Cooking Oil | All Purpose Flour | Granulated Sugar | |
| 1 mg | 0.001 mL | 0.001 mL | 0.001 mL | 0.002 mL | 0.001 mL |
| 2.5 mg | 0.003 mL | 0.002 mL | 0.003 mL | 0.005 mL | 0.003 mL |
| 5 mg | 0.005 mL | 0.005 mL | 0.006 mL | 0.009 mL | 0.006 mL |
| 10 mg | 0.01 mL | 0.01 mL | 0.011 mL | 0.019 mL | 0.012 mL |
| 20 mg | 0.02 mL | 0.019 mL | 0.023 mL | 0.038 mL | 0.024 mL |
| 30 mg | 0.03 mL | 0.029 mL | 0.034 mL | 0.057 mL | 0.035 mL |
| 40 mg | 0.04 mL | 0.039 mL | 0.045 mL | 0.076 mL | 0.047 mL |
| 50 mg | 0.05 mL | 0.049 mL | 0.057 mL | 0.095 mL | 0.059 mL |
| 60 mg | 0.06 mL | 0.058 mL | 0.068 mL | 0.113 mL | 0.071 mL |
| 70 mg | 0.07 mL | 0.068 mL | 0.08 mL | 0.132 mL | 0.083 mL |
| 80 mg | 0.08 mL | 0.078 mL | 0.091 mL | 0.151 mL | 0.095 mL |
| 90 mg | 0.09 mL | 0.087 mL | 0.102 mL | 0.17 mL | 0.106 mL |
| 100 mg | 0.1 mL | 0.097 mL | 0.114 mL | 0.189 mL | 0.118 mL |
| 125 mg | 0.125 mL | 0.121 mL | 0.142 mL | 0.236 mL | 0.148 mL |
| 150 mg | 0.15 mL | 0.146 mL | 0.17 mL | 0.284 mL | 0.177 mL |
| 175 mg | 0.175 mL | 0.17 mL | 0.199 mL | 0.331 mL | 0.207 mL |
| 200 mg | 0.2 mL | 0.194 mL | 0.227 mL | 0.378 mL | 0.237 mL |
| 225 mg | 0.225 mL | 0.218 mL | 0.256 mL | 0.425 mL | 0.266 mL |
| 250 mg | 0.25 mL | 0.243 mL | 0.284 mL | 0.473 mL | 0.296 mL |
| 500 mg | 0.5 mL | 0.485 mL | 0.568 mL | 0.945 mL | 0.591 mL |
| 750 mg | 0.75 mL | 0.728 mL | 0.852 mL | 1.418 mL | 0.887 mL |
| 1,000 mg | 1 mL | 0.971 mL | 1.136 mL | 1.89 mL | 1.183 mL |
When to Convert Milligrams to Milliliters
Milligrams and milliliters are both commonly used to measure cooking ingredients.
For medical applications, prescribed drug dosages are often specified by weight in milligrams. Doctors and pharmacists often need to convert a medication dosage to the appropriate liquid suspension as a volume in milliliters.
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 Milliliter?
The milliliter is a unit of volume equal to 1 cubic centimeter, 1/1,000 of a liter, or about 0.061 cubic inches.[3]
The milliliter is an SI unit of volume in the metric system. In the metric system, "milli" is the prefix for thousandths, or 10-3. A milliliter is sometimes also referred to as a millilitre. Milliliters can be abbreviated as mL, and are also sometimes abbreviated as ml or mℓ. For example, 1 milliliter can be written as 1 mL, 1 ml, or 1 mℓ.
Since one milliliter is equivalent to one cubic centimeter, milliliters are sometimes expressed using the abbreviation for a cubic centimeter (cc) for things such as medical dosages or engine displacements.
Learn more about milliliters.
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
- National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdf