The result of your conversion between grain/quart [UK] and ounce/gallon [US] appears here
To convert between Grain/quart [UK] and Ounce/gallon [US] you have to do the following:
First divide ((0.45359237/16)*(192/175)/480)/(0.00454609/4) / (0.45359237/16)/0.0037854118 = 0.00761302
Then multiply the amount of Grain/quart [UK] you want to convert to Ounce/gallon [US], use the chart below to guide you.
Symbol: gr/qt
No description
Symbol: oz/gal
No description