How Do You Convert Ppb to Ppm?

How Do You Convert Ppb to Ppm?

According to About.com, ppb stands for parts per billion and ppm stands for parts per million. To convert a ppb figure to a ppm figure, divide the ppb figure by 1,000.

Wikipedia notes that parts-per notation is used to describe very low concentrations in chemistry and for similar purposes in physics and engineering. It's a dimensionless number with no units. As fractions with round denominators, they're conceptually very similar to percentages.

Since a billion is a thousand millions, one part per billion is one-thousandth of a part per million. Conversely, one part per million is a thousand parts per billion. Thirty parts per billion would be 0.03 parts per million.