PPM
0 antonyms and opposites of PPM, grouped by meaning.
Abbreviation — Parts per million: a measure of the concentration of a substance, equal to one unit of it for every million units of the whole.
We haven't recorded synonyms for PPM yet. You can still read its full definition, where it comes from, or words that rhyme with it.
How to Use Ppm
The word patterns that sound natural to a native speaker.
Written in lower case in scientific contexts (ppm) and often capitalised elsewhere.
Etymology
An initialism; each sense abbreviates a different phrase.
Full origin of PPM →Frequently Asked Questions
What is the difference between ppm and percent?
Both express a proportion. One percent is one part in a hundred; one ppm is one part in a million. So 1 percent equals 10,000 ppm. Ppm is used when concentrations are too small for percentages to be readable.
How do you convert ppm to mg/L?
For substances dissolved in water at normal temperature, 1 ppm is equal to 1 mg/L, because a litre of water weighs about a kilogram. The equivalence does not hold for gases or for liquids of very different density.
What is the difference between ppm and ppb?
Ppb means parts per billion, a thousand times smaller than parts per million. Ppb is used for trace contaminants such as heavy metals in drinking water, where ppm figures would be a long string of decimal places.