The result of your conversion between Iron and ounce/gallon [US] appears here
To convert between Iron and Ounce/gallon [US] you have to do the following:
First divide 7658 / (0.45359237/16)/0.0037854118 = 1022.54572102
Then multiply the amount of Iron you want to convert to Ounce/gallon [US], use the chart below to guide you.
Symbol: iron
No description
Symbol: oz/gal
No description