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.
≈ 11–15.8 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% total tryptamines by dry weight, which is the representative figure from the pooled assay literature. A species with twice that content needs half the material for the same active dose, and the calculator divides accordingly.
The tiers (threshold, light, common, strong, heavy) are the figures Erowid and PsychonautWiki both publish. 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. Five pooled studies found body weight didn't really predict how intense it felt, so trials moved to fixed doses. If you turn it on, it's clamped between 0.75× and 1.35×.