Parts Per Million Definition

Definition: Parts per million is a commonly used unit of concentration for small values.

One part per million is one part of solute per one million parts solvent.

Also Known As: PPM

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Your Citation
Helmenstine, Anne Marie, Ph.D. "Parts Per Million Definition." ThoughtCo, Jun. 13, 2014, thoughtco.com/definition-of-parts-per-million-605482. Helmenstine, Anne Marie, Ph.D. (2014, June 13). Parts Per Million Definition. Retrieved from https://www.thoughtco.com/definition-of-parts-per-million-605482 Helmenstine, Anne Marie, Ph.D. "Parts Per Million Definition." ThoughtCo. https://www.thoughtco.com/definition-of-parts-per-million-605482 (accessed February 23, 2018).