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