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Unit Conversion Table
Mass Units 
Volume Units 
kilogram, kg 
liter, 1 
gram, g 
milliliter, ml 
milligram, mg 
microliter, µl 
microgram, µg 
nanoliter, nl 
nanogram, ng 
picoliter, pl 
Each new line in the table is a difference of 1000 from the line above or below.
 a difference of 2 lines is equal to parts per million (ppm)
 a difference of 3 lines is equal to parts per billion (ppb)
 a difference of 4 lines is equal to parts per triillion (ppt)
Examples:
nanogram per milligram = ppm
nanogram per milliliter = ppb
nanogram per kilogram = ppt
Click here for an interactive measurements conversion calculator
