The result of your conversion between ounce/gallon [US] and grain/gallon [US] appears here
To convert between Ounce/gallon [US] and Grain/gallon [US] you have to do the following:
First divide (0.45359237/16)/0.0037854118 / ((0.45359237/16)*(192/175)/480)/0.0037854118 = 437.5
Then multiply the amount of Ounce/gallon [US] you want to convert to Grain/gallon [US], use the chart below to guide you.
Symbol: oz/gal
No description
Symbol: gr/gal
No description