# PPM To Molarity Calculator

PPM is known as parts per million. Molarity can be expressed as concentration or the number of moles per liter of solution. This parts per million PPM to molarity calculator lets you to obtain the value of molarity just by entering the value of PPM and its atomic weight.

PPM is known as parts per million. Molarity can be expressed as concentration or the number of moles per liter of solution. This parts per million PPM to molarity calculator lets you to obtain the value of molarity just by entering the value of PPM and its atomic weight.

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**PPM to Molarity Formula:** To find the molarity from PPM, first multiply the PPM value with 0.001 and divide the resultant value by atomic weight.

#### Formula:

Molarity = ( Parts Per Million (PPM) value × 0.001 ) / Atomic Weight
**Parts per million:** PPM is expressed as milligrams per liter(mg/L). It measures the mass of the chemical substance or concentration per unit weight of water/solid or volume of one part of gas. One part per million is equal to 0.000001 units.

**Molarity:** It is the number of moles of a solute per liter of solution. It express the concentration of a solution.

An online **PPM To Molarity calculator** to convert values from PPM to the Molarity. You just to input the PPM and atomic weight value to calculate the equivalent Molarity value.

#### Example

** Calculate the molarity (mol/L) if there is 64 ppm of Ca**^{2+} ions. And, 40.08g/mol is the atomic weight for calcium ion

Molarity = ( PPM value * 0.001 ) / Atomic Weight

= ( 64 * 0.001 ) / 40.08

= 0.001596806 mol/L