How do I calculate NMA from a royalty interest?

Ownership and Title
1

For example I have a 0.00003795 RI on the Diamond M Unit in Scurry County? It seems like a very small NMA but how do I figure it out? Seems like I would need a copy of the Division Order or something?

A better example is Williams ND where there are 7 wells named Moline and Berger and Sylte and each one of these says I have a .00002051 interest in these wells in section 3,10 of T156N-R101W. There has to be a way I can come up with my total NMA of these 2 sections but I don’t know how?

2

Basic calculation of decimal is based on your NMA, the royalty rate under your oil and gas lease and the gross mineral acres for the well. The oil and gas lease will also describe the gross acres in which own a fractional interest, but not your fractional ownership (such as 1/3 or 1/10).