Dose calculator
Dose by species, not by habit. A gram of azurescens is roughly three grams of cubensis, and this does that conversion for you.
Representative alkaloid content 0.63% of dry weight, the reference.
Off by default. The evidence for weight-scaling psilocybin is weak, see the note in the results.
≈ 6.3–15.8 mg psilocybin-equivalent
Full psychedelic effect. Strong visuals with eyes closed, altered thought, emotional intensity.
The classic full dose. Wants a cleared day. Hard patches are possible and usually pass on their own.
How this works
Everything is anchored to dried Psilocybe cubensis at 0.63% by dry weight, the long-quoted psilocybin figure for cubensis. It is a reference point rather than a measured average: modern assays of individual cubensis mushrooms spread several-fold either side of it. A species with twice that content needs half the material for the same active dose, and the calculator divides accordingly.
The tiers from threshold to heavy follow the dried-cubensis table PsychonautWiki publishes (Erowid’s agrees from common upward). The microdose band is ours, and stops below threshold. The milligram column is the same dose as psilocybin-equivalent, the way trials report it: the 25 mg dose from the depression studies is about four grams of dried cubensis.
The reference percentages sit in the middle of the measured range, not at the top. A too-small estimate leads to redosing on a dose that hasn't fully come up, so the maths leans conservative.
Body-weight scaling is there and switched off. A pooled analysis of ten trials found body weight didn’t predict how intense it felt, and the large recent trials use a fixed dose. If you turn it on, it’s clamped between 0.75× and 1.35×.
Recent use is reported but never added to the dose. Tolerance makes a normal amount feel weaker, and the honest response to that is to wait, not to take more on the strength of a model.