The result of your conversion between newton meter and grain/cubic foot appears here
To convert between Newton Meter and Grain/cubic Foot you have to do the following:
First divide 1 / ((0.45359237/16)*(192/175)/480)/((0.0037854118/231)*1728) = 436.99572588
Then multiply the amount of Newton Meter you want to convert to Grain/cubic Foot, use the chart below to guide you.
Symbol: Nm
No description
Symbol: gr/ft³
No description