The result of your conversion between ounce/cubic foot and grain/quart [US] appears here
To convert between Ounce/cubic Foot and Grain/quart [US] you have to do the following:
First divide (0.45359237/16)/((0.0037854118/231)*1728) / ((0.45359237/16)*(192/175)/480)/(0.0037854118/4) = 14.62131076
Then multiply the amount of Ounce/cubic Foot you want to convert to Grain/quart [US], use the chart below to guide you.
Symbol: oz/fm³
No description
Symbol: gr/qt
No description