How to calculate PPM (Parts Per Million)?

Short tutorial on how to calculate Parts Per Million (PPM). Calculation with formula.

Parts Per Million Calculation

PPM, also known as Parts per million, is a parameter to measure the quality of a liquid or a substance. In other words it is defined as the measure of a substance in a specific quantity of a solution. In this short tutorial, let us discuss on what is parts per million and how to calculate PPM with simple example.
PPM is an abbreviation for "parts per million" and is expressed as milligrams per liter (mg/L). PPM can also be used to measure quality of products. One PPM means one defect in a million opportunities. It is defined as 1/1,000,000 defects, which is 1% defect or 10,000 PPM.

In Chemistry, a solute concentration of 1 PPM is defined as solute concentration of 1/1000000 of the solution. PPB (Parts per Billion) is commonly used unit of concentration for very small values. 1 PPB is one part of solute per one billion parts solvent.

PPM as Percentage:
PPM is derived from the fact that the density of water is taken as 1kg/L = 1,000,000 mg/L, and 1mg/L is 1mg/1,000,000mg which is one part in one million (1 PPM). That is 1000 ml is one liter, so that 1 ppm = 1 mg per liter = mg/Liter. Given below is the representation of PPM in percentage.

PPM (Parts Per Million) to % (Parts Per Hundred)
1 PPM = 1/1,000,000 = 0.000001 = 0.0001%
10 PPM = 10/1,000,000 = 0.00001 = 0.001%
5000 PPM = 5000/1,000,000 = 0.005 = 0.5%
10,000 PPM = 10000/1,000,000 = 0.01 = 1.0%

Calculating PPM - Formula:
Calculating PPM (Parts Per Million) is defined as just knowing how many mg of solute is dissolved in 1000g (1L) of water.

PPM (Parts Per Million) = (mass solute (g) / volume of solution (mL) ) x 106
Htc Ppm Formula
Parts Per Million Calculation With Example:
Let us consider a solution of 375 mL. How to calculate PPM (parts per million) for a solute of 6.3 x 10-3 g.

Mass of Solute = 6.3 x 10-3 g
Volume of Solution = 375 mL

PPM = (6.3 x 10-3 / 375 mL) x 106
= 16.8 ppm = 17 ppm(approx)
Parts Per Million Example

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