Mg to ML Calculator – Convert Milligrams to Milliliters Instantly
The mg to mL Calculator is a simple yet powerful tool that helps you accurately convert weight (in milligrams) into volume (in milliliters) — and vice versa. This is especially useful for liquids with known densities, such as water, milk, cooking oil, and even medicines. By entering just one value and knowing the density of the substance, you can quickly find the equivalent amount in the other unit.
Milligrams (mg) measure mass, while milliliters (mL) measure volume — so they are different physical quantities. To convert between them, you need the density of the substance, usually given in mg/mL or g/mL. For example, water has a density of 1000 mg/mL, meaning 1 milliliter equals 1000 milligrams. With this, the formula for converting mg to mL is:
mL = mg ÷ density
If the density is in g/mL, multiply it by 1000 first to convert it into mg/mL. Reversing the process, the formula for mL to mg conversion is:
mg = mL × density
How the mg to mL Calculator Works
Select the liquid or substance (water, milk, oil, medication, or custom density).
Enter your known value — either in milligrams or milliliters.
The calculator instantly displays the converted result in the chosen unit.
This tool is ideal for cooking, baking, chemistry, and liquid medicine dosage calculations. For example:
5000 mg of water ÷ 1000 = 5 mL
25 mL of cooking oil × 916 mg/mL = 22,900 mg
Why Density Matters
The mg to mL conversion depends entirely on the liquid’s density. While water’s density makes the math easy, other substances differ:
Water ≈ 1000 mg/mL
Milk ≈ 1035 mg/mL
Cooking oil ≈ 916 mg/mL
These variations explain why mg to mL or mL to mg conversions are not always straightforward.
Conversion Table for Common Liquids
| Weight (mg) | Water (mL) | Milk (mL) | Cooking Oil (mL) |
|---|---|---|---|
| 10 mg | 0.01 mL | 0.0097 mL | 0.0114 mL |
| 50 mg | 0.05 mL | 0.0485 mL | 0.0568 mL |
| 100 mg | 0.1 mL | 0.0971 mL | 0.1136 mL |
| 250 mg | 0.25 mL | 0.2427 mL | 0.2841 mL |
| 500 mg | 0.5 mL | 0.4854 mL | 0.5682 mL |
FAQs – mg to mL Conversion
Q: How do I convert mg to mL?
A: Divide the number of milligrams by the density in mg/mL. For water, divide by 1000.
Q: How do I convert mL to mg?
A: Multiply the volume in milliliters by the density in mg/mL.
Q: What is 100 mg in mL?
A: For water, 100 mg = 0.1 mL.
Q: Why is density important?
A: Because mass and volume are related through density — different liquids have different densities, affecting the conversion.
Also you can check liters to gallons converter here.
