The result of your conversion between nanogram/cubic centimeter and grain/cubic foot appears here
To convert between Nanogram/cubic Centimeter and Grain/cubic Foot you have to do the following:
First divide 1.0E-12/0.000001 / ((0.45359237/16)*(192/175)/480)/((0.0037854118/231)*1728) = 0.000437
Then multiply the amount of Nanogram/cubic Centimeter you want to convert to Grain/cubic Foot, use the chart below to guide you.
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