GRAIN/GALLON [US] TO NANOGRAM/CUBIC MILLIMETER (gr/gal TO ng/mm³) FORMULA 
		
		 To convert between Grain/gallon [US] and Nanogram/cubic Millimeter you have to do the following: 
				
		
	
		First divide  ((0.45359237/16)*(192/175)/480)/0.0037854118 / 1.0E-12/1.0E-9 = 17.11806097 
		Then multiply the amount of Grain/gallon [US] you want to convert to Nanogram/cubic Millimeter, use the chart below to guide you.
		
		GRAIN/GALLON [US] TO NANOGRAM/CUBIC MILLIMETER (gr/gal TO ng/mm³) CHART
		
			- 1 grain/gallon [US] in nanogram/cubic millimeter = 17.11806097 gr/gal
 - 10 grain/gallon [US] in nanogram/cubic millimeter = 171.18060973 gr/gal
 - 50 grain/gallon [US] in nanogram/cubic millimeter = 855.90304865 gr/gal
 - 100 grain/gallon [US] in nanogram/cubic millimeter = 1711.80609729 gr/gal
 - 250 grain/gallon [US] in nanogram/cubic millimeter = 4279.51524323 gr/gal
 - 500 grain/gallon [US] in nanogram/cubic millimeter = 8559.03048646 gr/gal
 - 1,000 grain/gallon [US] in nanogram/cubic millimeter = 17118.06097292 gr/gal
 - 10,000 grain/gallon [US] in nanogram/cubic millimeter = 171180.60972917 gr/gal