The result of your conversion between Iron and ounce/gallon [UK] appears here
To convert between Iron and Ounce/gallon [UK] you have to do the following:
First divide 7658 / (0.45359237/16)/0.00454609 = 1228.02620229
Then multiply the amount of Iron you want to convert to Ounce/gallon [UK], use the chart below to guide you.
Symbol: iron
No description
Symbol: oz/gal
No description