Enter the molarity and the molar mass of a substance into the calculator to convert the concentration from moles per liter (mol/L) to parts per million (ppm).

Mol/L to PPM Formula

The following formula is used to convert molarity (mol/L) to ppm:

PPM = Molarity (mol/L) * Molar Mass (g/mol) * 1000

Variables:

  • PPM is the concentration in parts per million
  • Molarity is the concentration in moles per liter (mol/L)
  • Molar Mass is the mass of one mole of the substance (g/mol)

To convert molarity to ppm, multiply the molarity by the molar mass of the substance and then multiply by 1000 to convert from g/L to mg/L, which is equivalent to ppm.

What is PPM?

PPM stands for “parts per million” and is a unit commonly used to express the concentration of a substance in a solution. It denotes the number of parts of a substance in a million parts of the total solution. It is equivalent to milligrams of substance per liter of solution (mg/L).

How to Calculate PPM from Mol/L?

The following steps outline how to calculate the PPM from Mol/L.

  1. First, determine the molarity of the substance in the solution (mol/L).
  2. Next, determine the molar mass of the substance (g/mol).
  3. Use the formula PPM = Molarity * Molar Mass * 1000.
  4. Finally, calculate the concentration in PPM.
  5. 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.

Molarity (mol/L) = 0.002 mol/L

Molar Mass (g/mol) = 58.44 g/mol (for NaCl)