Magic Mushrooms Calculator (Educational Estimator)
Use this tool to estimate dried-equivalent mass and approximate psilocybin content. It is an educational harm-reduction calculator only and not medical or legal advice.
What this calculator does
This magic mushrooms calculator helps estimate two things: (1) dried-equivalent weight and (2) approximate milligrams of psilocybin based on a user-selected potency percentage. It is designed for educational understanding, not instructions for use.
Because fresh mushrooms contain substantial water, fresh weight can be misleading. A common rule of thumb is that 10 grams fresh ≈ 1 gram dried, though this varies by drying method and species.
How the estimate is calculated
1) Convert fresh to dried equivalent
If you choose fresh, the calculator assumes 90% water loss during drying:
- Dried equivalent (g) = Fresh grams × 0.10
- If you choose dried, dried equivalent is simply the entered amount
2) Estimate psilocybin content
Psilocybin estimate is based on dried mass and potency percentage:
- Estimated psilocybin (mg) = Dried grams × 1000 × (Potency % / 100)
- The tool also shows a variability range of ±30% to reflect natural uncertainty
Why potency varies so much
Potency differences are one of the biggest reasons people misjudge outcomes. Even experienced users can be surprised by variance. Key factors include:
- Species and genetics
- Growing conditions and harvest timing
- How material was dried and stored
- Age and oxidation during storage
- Uneven active compound distribution between individual mushrooms
Interpreting the result responsibly
The number shown is an estimate, not a certainty. Think of it as a rough analytical aid. If the estimated active content appears high, uncertainty risk rises quickly. Set and setting, emotional state, and co-use with substances like alcohol or cannabis can change subjective intensity.
If someone feels distressed, panicked, confused, or physically unwell, seek immediate support from a trusted sober person and contact local emergency services if symptoms escalate.
Safety and harm-reduction reminders
- Know your local laws before possessing or consuming any controlled substance.
- Avoid mixing with alcohol, stimulants, or unknown compounds.
- Be cautious if taking SSRIs, MAOIs, or other psychiatric medications.
- Do not drive or operate machinery while impaired.
- People with personal or family history of psychosis should use extra caution and consult a qualified clinician.
- Start with information, not assumptions—potency can surprise you.
FAQ
Is this a dose recommendation tool?
No. This page provides conversion and content estimation only. It does not provide personalized medical guidance.
Can two mushrooms with same weight have different potency?
Yes. Active compounds can vary substantially between individual mushrooms, even from the same harvest.
What is the best use of this calculator?
Educational context, comparison of fresh vs dried weights, and awareness of potency uncertainty.