The result of your conversion between kiloton/cubic mile [US] and grain/quart [UK] appears here
To convert between Kiloton/cubic Mile [US] and Grain/quart [UK] you have to do the following:
First divide ((0.45359237*2000)*1000)/(((0.0037854118/231)*1728*27)*5451776000) / ((0.45359237/16)*(192/175)/480)/(0.00454609/4) = 0.00381733
Then multiply the amount of Kiloton/cubic Mile [US] you want to convert to Grain/quart [UK], use the chart below to guide you.
Symbol: kt/mi³
No description
Symbol: gr/qt
No description