The result of your conversion between Iron and ounce/cubic foot appears here
To convert between Iron and Ounce/cubic Foot you have to do the following:
First divide 7658 / (0.45359237/16)/((0.0037854118/231)*1728) = 7649.17318581
Then multiply the amount of Iron you want to convert to Ounce/cubic Foot, use the chart below to guide you.
Symbol: iron
No description
Symbol: oz/fm³
No description