The result of your conversion between erg and grain/gallon [UK] appears here
To convert between Erg and Grain/gallon [UK] you have to do the following:
First divide 0.0000001 / ((0.45359237/16)*(192/175)/480)/0.00454609 = 0.00000702
Then multiply the amount of Erg you want to convert to Grain/gallon [UK], use the chart below to guide you.
Symbol: erg
No description
Symbol: gr/gal
No description