The result of your conversion between pound/cubic foot and gram/cubic millimeter appears here
To convert between Pound/cubic Foot and Gram/cubic Millimeter you have to do the following:
First divide 0.45359237/((0.0037854118/231)*1728) / 0.001/1.0E-9 = 0.00001602
Then multiply the amount of Pound/cubic Foot you want to convert to Gram/cubic Millimeter, use the chart below to guide you.
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