The result of your conversion between Iron and pound/gallon [US] appears here
To convert between Iron and Pound/gallon [US] you have to do the following:
First divide 7658 / 0.45359237/0.0037854118 = 63.90910756
Then multiply the amount of Iron you want to convert to Pound/gallon [US], use the chart below to guide you.
Symbol: iron
No description
Symbol: lb/gal
No description