what 001 said, no reliable ref chart but you can visually discern when the oil will no longer take any
it is close to 1 to 1 volumetrically in my experience, basically to the point that it doesnt really matter how much you need in there...unless youre filling your own caps. worst case scenario you do have to dig into some isolate but rosin at a 1:1 ratio with oil should be straight overkill for anyone
basically, work backwards from your intended mg amount per dose accounting for loss at appropriate stages, because the limit for dissolving it in oil is well past anything even online shops are selling