# 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 10**^{6}

**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 10^{6}

= 16.8 ppm = 17 ppm(approx)

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