The result of your conversion between grain/gallon [UK] and Iron appears here
To convert between Grain/gallon [UK] and Iron you have to do the following:
First divide ((0.45359237/16)*(192/175)/480)/0.00454609 / 7658 = 0.00000186
Then multiply the amount of Grain/gallon [UK] you want to convert to Iron, use the chart below to guide you.
Symbol: gr/gal
No description
Symbol: iron
No description