The result of your conversion between barrel [US, liquid] and gallon [US, liquid] appears here
To convert between Barrel [US, Liquid] and Gallon [US, Liquid] you have to do the following:
First divide (0.000016387064*231)*31.5 / 0.000016387064*231 = 31.5
Then multiply the amount of Barrel [US, Liquid] you want to convert to Gallon [US, Liquid], use the chart below to guide you.
Symbol: bbl
No description
Symbol: gal
No description