PPM Definition (Parts Per Million)

Scientific Meaning

liquids being mixed
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PPM Definition: PPM stands for parts per million. It is commonly used to express concentration and temperature coefficients.

Also Known As: parts per million

Examples: 100 ppm is identical to 0.01%

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Your Citation
Helmenstine, Anne Marie, Ph.D. "PPM Definition (Parts Per Million)." ThoughtCo, Aug. 27, 2020, thoughtco.com/ppm-definition-606763. Helmenstine, Anne Marie, Ph.D. (2020, August 27). PPM Definition (Parts Per Million). Retrieved from https://www.thoughtco.com/ppm-definition-606763 Helmenstine, Anne Marie, Ph.D. "PPM Definition (Parts Per Million)." ThoughtCo. https://www.thoughtco.com/ppm-definition-606763 (accessed February 28, 2021).