The result of your conversion between pound/gallon [US] and grain/gallon [US] appears here
To convert between Pound/gallon [US] and Grain/gallon [US] you have to do the following:
First divide 0.45359237/0.0037854118 / ((0.45359237/16)*(192/175)/480)/0.0037854118 = 7000.
Then multiply the amount of Pound/gallon [US] you want to convert to Grain/gallon [US], use the chart below to guide you.
Symbol: lb/gal
No description
Symbol: gr/gal
No description