ppb to ppm conversion

How to convert ppb to ppm

ppm and ppb are defined as:

1ppm = 1/10⁶ = 10^-6

1ppb = 1/10⁹ = 10^-9

So

1ppm = 1000ppb

The number of parts-per million x_ppm is equal to the number of parts-per billion x_ppb divided by 1000:

x_ppm = x_ppb / 1000

ppb to ppm conversion table

ppm to ppb conversion