The result of your conversion between foot pound and grain/gallon [UK] appears here
To convert between Foot Pound and Grain/gallon [UK] you have to do the following:
First divide 1.3558179 / ((0.45359237/16)*(192/175)/480)/0.00454609 = 95.11996725
Then multiply the amount of Foot Pound you want to convert to Grain/gallon [UK], use the chart below to guide you.
Symbol: ft lb
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Symbol: gr/gal
No description