Convert milligrams or other mass units to moles, reverse-solve mass or molar mass, and see millimoles, micromoles, and particle counts.
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mg To Moles Formula
The following formula is used to calculate the conversion from milligrams to moles.
Variables:
- Moles is the amount of substance (moles)
- m is the mass of the substance in milligrams
- M is the molar mass of the substance in grams per mole (g/mol)
Convert the mass from milligrams to grams, then divide by molar mass in g/mol. Equivalently, divide mass in mg by molar mass expressed in mg/mol.
| Mass (mg) | Moles (mol) | Millimoles (mmol) | Micromoles (µmol) |
|---|---|---|---|
| 0.1 | 0.000001 | 0.001 | 1 |
| 0.5 | 0.000005 | 0.005 | 5 |
| 1 | 0.00001 | 0.01 | 10 |
| 2 | 0.00002 | 0.02 | 20 |
| 5 | 0.00005 | 0.05 | 50 |
| 10 | 0.0001 | 0.1 | 100 |
| 20 | 0.0002 | 0.2 | 200 |
| 25 | 0.00025 | 0.25 | 250 |
| 50 | 0.0005 | 0.5 | 500 |
| 75 | 0.00075 | 0.75 | 750 |
| 100 | 0.001 | 1 | 1,000 |
| 150 | 0.0015 | 1.5 | 1,500 |
| 200 | 0.002 | 2 | 2,000 |
| 250 | 0.0025 | 2.5 | 2,500 |
| 300 | 0.003 | 3 | 3,000 |
| 400 | 0.004 | 4 | 4,000 |
| 500 | 0.005 | 5 | 5,000 |
| 750 | 0.0075 | 7.5 | 7,500 |
| 1,000 | 0.01 | 10 | 10,000 |
| 5,000 | 0.05 | 50 | 50,000 |
| * Values rounded for readability. Assumes molar mass M = 100.00 g/mol (100,000 mg/mol). Formula: n (mol) = mass (mg) ÷ M (mg/mol). For this assumption: 1 mg = 0.00001 mol = 0.01 mmol = 10 µmol. | |||
What is mg To Moles?
mg to moles converts the mass of a specified substance to amount of substance using its molar mass. Molar mass has units such as g/mol; relative molecular mass (often called molecular weight) is dimensionless. One mole contains exactly 6.02214076 x 10^23 specified elementary entities, such as atoms, molecules, ions or formula units. Use matching mass units in n = mass / molar mass.
How to Calculate mg To Moles?
The following steps use n (mol) = mass (mg) / 1000 / molar mass (g/mol).
- First, determine the mass of the substance (m) in milligrams.
- Next, determine the molar mass of the exact substance (M) in grams per mole.
- Convert the mass from mg to g, then use n = (m / 1000) / M.
- Finally, calculate the Moles.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Mass of the substance (m) = 150 mg
Molar mass of the substance (M) = 25 g/mol. Then n = (150 / 1000) / 25 = 0.006 mol = 6 mmol.
