Parts Per Converter

If percentages per billion and parts per million continue to perplex you, try this PPM calculator. It is a basic tool for converting PPM to units such as percent or parts per million (PPM). This Converter converts the measured value in [ppm] units to other part units and vice versa. The unit ppm is used in multiple fields in various ways. 


PPM: PPM is an abbreviation for "parts per million," It is used to quantify the concentration of a solution in air or water. It is even possible to express it in milligrammes per litre (mg/L).


PPB: PPB is an abbreviation for "parts per billion," It is used to calculate the concentration of a solution (mass fraction or mole fraction ). 1 ppb is equivalent to 1 g/l.


PPT: PPT is an abbreviation for "parts per trillion," It is used to quantify the concentration of a solution in air or water. One PPT is equal to one nanogram per kilogram.


How to calculate PPM and percentages?

The percentage metrics are all very similar in that they express minuscule amounts of dimensionless quantities, such as the volumetric proportion of NO2 in the air. So, for example, if the concentration of NO2 is 1 ppm, this indicates that if you take a "sample" of air and split it into a million parts, one of them will contain NO2.


How to use the PPM converter tool?

  • Enter the value in the input fields and specify the PPM format.
  • Then click the calculate button and see the results displayed on the screen.


Consider the following example: You've made a NaCl-salt solution in water. You used 0.002 grams of salt; the solution's ultimate mass is 1 kilogram.

That example, the decimal is equivalent to:

0.002 g / 1,000 g=0.000002


To calculate the percentage, multiply this figure by 100:



Multiply the decimal value by a thousand to get the value:



Finally, multiply the decimal number by a billion to get the accurate PPB value:

0.000002×1,000,000,000 PPB

=2,000 PPB