# Parts Per Trillion (PPT) Calculator

Posted by Dinesh onppt is a value that represents the concentration of one part per trillion parts (1/1,000,000,000,000) of something in water or soil. One ppt is equivalent to 1 milligram of something per liter of water or 1 milligram of something per kilogram of soil.

### Formula:

PPT = (Defective Parts / Total Parts) × 1,000,000,000,000

Defective Rate = (Defective Parts / Total Parts)

Defective Rate (%) = (Defective Parts / Total Parts) × 100