The result of your conversion between nanogram/litre and grain/gallon [UK] appears here
To convert between Nanogram/litre and Grain/gallon [UK] you have to do the following:
First divide 1.0E-12/0.001 / ((0.45359237/16)*(192/175)/480)/0.00454609 = 0.00000007
Then multiply the amount of Nanogram/litre you want to convert to Grain/gallon [UK], use the chart below to guide you.
Symbol:
No description
Symbol:
No description