I believe what you're looking for is the "steroid weight." Basically, the molecule has an ester attached to it, and that ester weights something. Your body's enzymes remove the ester from the molecule, creating testosterone. So in theory, only the testosterone part of the molecule is what matters.
There's some information here:
About SteroidGraph
"Injectable steroids are typically bound by esters, which comprise a portion of the steroid's weight. Because of this, 100mg of, for example, testosterone enanthate does not equate to 100mg of pure testosterone. In this case, there is only 70mg of testosterone being injected, and the remaining 30mg is the enanthate ester. This is taken into account when plotting cycles on this site, as different esters have different weights."
A given person's response to the testosterone, and the variation seen between people with respect to doses / responses, has more to do with individual biochemistry than the ester weight.
I could see figuring out ester weight being important if you were e.g. switching from cypionate to undecanoate or something. But if you're already on like 100mg of cyp every 7 days, a dose adjustment should probably be made based on your own response to the dose. E.g. your labs.
