PPM to Molarity Calculator

This PPM to Molarity calculator makes the conversion of ppm to molarity for any molecule or element dissolved in water.

PPM stands for parts per million is a unit that is used in several branches in different ways. On the other hand, molarity tells us that in one liter of water how many moles of molecules present?


Formula of PPM to Molarity Calculator

To convert ppm to molarity we can divide the ppm by 1000. The complete formula is given below.

Molarity = ((ppm * 0.001) / molar mass)


To calculate the molar mass of gas, you can use our Molar Mass Of Gas Calculator.


Calculate the molarity (mol/L) if there is 70 ppm of Ca2+ ions. And, 33 g/mol is the atomic weight of calcium ions.

Given data

ppm value = 70 ppm
molar mass = 33 g/mol

To Find

molarity = ?


To convert PPM to molarity, let us use the formula listed below:

Molarity = ((ppm * 0.001) / molar mass)

Putting values in the formula:

molarity =  (70 * 0.001) / 33
molarity = 0.0021 mol/l

How to use the PPM to Molarity Calculator?

The steps to use the PPM to molarity calculator are as follows:

Step 1: Enter the value of ppm in the first required input.

Step 2: Enter the value of molar mass in the second required input.

Step 3: The calculator will automatically display an answer on the screen.

Calculator use

This free PPM to Molarity calculator is used for measurements of drinking water quality and producing chemical solutions also use the above free formulas and examples to make your problems easy.