The result of your conversion between grain/gallon [US] and grain/quart [US] appears here
To convert between Grain/gallon [US] and Grain/quart [US] you have to do the following:
First divide ((0.45359237/16)*(192/175)/480)/0.0037854118 / ((0.45359237/16)*(192/175)/480)/(0.0037854118/4) = 0.25
Then multiply the amount of Grain/gallon [US] you want to convert to Grain/quart [US], use the chart below to guide you.
Symbol: gr/gal
No description
Symbol: gr/qt
No description