pptppmppb

percent = % = 1/100 = 10^-2

ppt (part per thousand) = 1/100 = 10^-3

ppm (part per million) = 1/1.000.000 = 10^-6

ppb (part per billion) = 1/1.000.000.000 = 10^-9

^{in volume}

^ppt =

^ppm = 

^ppb =

^{it’s mean :}

^{1 KL = 1 Ton}

^{1 L (Liter) = 1 Kg}