PPM Calculator

Created by Bogna Szyk
Reviewed by Rijk de Wet
Last updated: Mar 20, 2022

If percentages, per mills and parts per million still confuse you, give this PPM calculator a shot. It is a simple tool that can be used for conversion from PPM to units such as percents or parts per billion (PPB). In this article, we will provide you with a short description of each of the proportion metrics and give you a detailed explanation of how to calculate PPM and percentages.

How to calculate PPM and percents

All of the proportion metrics are quite similar: they describe small values of dimensionless quantities, such as the volumetric proportion of NO2\text{NO}_2 in the air. For example, PPM means "parts per million". If you find out that the concentration of NO2\text{NO}_2 is equal to 1 ppm, it means that if you take a "sample" of air and divide it into a million parts, one of them will consist of NO2\text{NO}_2.

The proportion metrics are as follows:

  • Percentage: equal to 1 per 100;
  • Permille: equal to 1 per 1,000;
  • PPM: equal to 1 per 1,000,000;
  • PPB: equal to 1 per 1,000,000,000; and
  • PPT: equal to 1 per 1,000,000,000,000.

PPM conversion: an example

Let's take the following example: you have created a solution of salt (NaCl\text{NaCl}) in water. You used 0.005 grams of salt, and the final mass of the solution is equal to 1 kilogram. How many parts per million (PPM) of salt are in the solution?

  1. Start with expressing the solution concentration as a decimal. There are 0.005 grams of salt in 1 kilogram (1000 grams). It means that the decimal is equal to
0.005 g / 1,000 g=0.000005\footnotesize \quad\enspace 0.005\ \text{g}\ /\ 1,\!000\ \text{g} = 0.000005
  1. To find the percentage, multiply this value by a hundred:
0.000005×100%=0.0005%\footnotesize \quad\enspace 0.000005 \times 100 \% = 0.0005\%
  1. To find the permille value, multiply the decimal by a thousand:
0.000005×1,000=0.005\footnotesize \quad\enspace 0.000005 \times 1,\!000 ‰ = 0.005‰
  1. For the PPM, multiply the decimal by a million:
0.000005×1,000,000 PPM=5 PPM\footnotesize \quad\enspace \begin{split} & 0.000005 \times 1,\!000,\!000\ \text{PPM} \\ &= 5\ \text{PPM} \end{split}
  1. Finally, for the PPB, multiply the decimal by a billion:
0.000005×1,000,000,000 PPB=5,000 PPB\footnotesize \quad\enspace \begin{split} & 0.000005 \times 1,\!000,\!000,\!000\ \text{PPB} \\ &= 5,\!000\ \text{PPB} \end{split}

One of the applications of such PPM calculations in everyday life, is to find and adjust the salinity of your swimming pool.

Bogna Szyk
Check out 140 similar conversion calculators
AcreageAcres to hectares converterAcres to square feet converter… 137 more
People also viewed…

Feet to miles

Use feet to miles converter to easily convert feet to miles.

Plastic Footprint

Find out how much plastic you use throughout a year with this plastic footprint calculator. Rethink your habits, reduce your plastic waste, and make your life a little greener.


The sleep calculator can help you determine when you should go to bed to wake up happy and refreshed.

ml to kg

Use our ml to kg converter if you're struggling to estimate your product's volume in ml.
Omni Calculator
Copyright by Omni Calculator sp. z o.o.
Privacy policy & cookies
main background