Like I said a few posts back about how involved doing an accurate conversion would be in lieu of just going for *fudgey*:
"Do what you like".
If you are really interested - and I would be surprised if you were - in what the actual multiplicative conversion factors are in the field of mathematics on the subject of values as units-of-measure and conversion; you might enjoy reading
this.
But unless you are a mathematician, you might enjoy a root-canal more. ;-D
Otherwise, my best suggestion is what I also said in my earlier post: simply make your best estimate by feel and make a fudgey analog, and get out there and
"Fight On!"
JK