Molarity |

Free online ppm to molarity calculator – determine the molarity of a substance in solution, Simply enter the ppm value and the molar mass then click the calculate button.

## PPM to Molarity Formula

To convert from ppm to molarity, you can use the following formula

**M = (PPM *0.001) / MW**

- M = Molarity
- PPM = Parts per million
- MW = Molar mass of the substance (g/mol)

## How to convert PPM to Molarity?

Here are the steps to convert ppm to molarity

- First, calculate the ppm of the solution
- Second, Calculate the molecular weight(molar mass) of the substance for which you want to convert ppm to molarity
- finally, put values into the formula and calculate the molarity

## Solved Example

**Example** – A solution of 200 ppm of a substance with a molecular weight of 40 g/mol then calculate molarity

**Solved-**

Given- parts per millions = 200 ppm, Molecular Weight = 40 g/mol

Molarity = (200 * 0.001) / 40 = 0.005 M

so, the molarity of the solution is 0.005 M