The result of your conversion between thermie and grain/quart [UK] appears here
To convert between Thermie and Grain/quart [UK] you have to do the following:
First divide 4185800 / ((0.45359237/16)*(192/175)/480)/(0.00454609/4) = 73415677.52451392
Then multiply the amount of Thermie you want to convert to Grain/quart [UK], use the chart below to guide you.
Symbol: th
No description
Symbol: gr/qt
No description