The result of your conversion between pound/gallon [US] and pound/cubic inch appears here
To convert between Pound/gallon [US] and Pound/cubic Inch you have to do the following:
First divide 0.45359237/0.0037854118 / 0.45359237/(0.0037854118/231) = 0.004329
Then multiply the amount of Pound/gallon [US] you want to convert to Pound/cubic Inch, use the chart below to guide you.
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