Enter the molarity and molecular weight into the calculator below to convert to mg/mL, or enter any 2 values to solve for the third.

Molarity To Mg/mL Converter

↔ Switch to Mg/mL to Molarity

Enter any 2 values to calculate the missing variable

Molarity to mg/mL Formula

C_{\mathrm{mg/mL}} \;=\; M_{\mathrm{mol/L}} \times MW_{\mathrm{g/mol}}

To convert molarity to mg/mL, multiply the molarity by the molecular weight. Since 1 g/L is numerically equal to 1 mg/mL, the product M × MW directly gives the concentration in mg/mL.

Representative Molarity → mg/mL (for MW = 100 g/mol)
Molarity (mol/L) Molecular Weight (g/mol) Concentration (mg/mL)
0.0000011000.0001
0.0010001000.1000
0.0100001001.0000
0.10000010010.0000
1.000000100100.0000
2.000000100200.0000
5.000000100500.0000
10.0000001001000.0000
* C(mg/mL) = M(mol/L) × MW(g/mol). Values scale linearly with MW. For a different MW, multiply the mg/mL column by (MW / 100).

Example Problem

Use the following example problem to compare with the output from the calculator above and confirm the results.

  1. Given molarity M = 0.1000 mol/L and molecular weight MW = 180.156 g/mol.
  2. Using the formula C(mg/mL) = M × MW.
  3. Plugging in the values: C = 0.1000 × 180.156 = 18.0156 mg/mL.
  4. The result is 18.0156 mg/mL.