📊 Smart Calculation
Based on psilocybin decay rates
🍄 Magic Mushroom Tolerance Calculator
Estimate how much you need to adjust your dosage based on your last trip. Account for tolerance buildup and strain potency to find your sweet spot.
🧬 Strain Specific
Accounts for different potencies
📅 Time Factor
Calculates daily tolerance drop
🔒 100% Free
No registration needed
Calculate Adjustment
1. Previous Trip Details
2. Next Trip Goal
Example Calculation
Scenario: User took 2g of Golden Teacher 3 days ago. Wants a Moderate Trip with B+ today.
- Last Strain: Golden Teacher (0.63%)
- Last Amount: 2.0 g
- Days Since: 3 days
- Goal: Moderate Trip (B+)
Result: ~3.9g - 4.1g of B+ needed.
Why? Due to the recent consumption, your receptors are downregulated. The calculator estimates you need ~35% more than the standard dose to achieve the same effects.
The Logic:
We calculate a Tolerance Factor based on an exponential decay model.
Formula:
New Dose = Standard Dose * (1 + (Old Dose / Standard Dose) * e^(-0.3 * Days))
This formula ensures that at 0 days (immediate redosing), the requirement is drastically higher (often 200%+), while at 14 days, the factor returns to nearly 1.0 (baseline).
⚠️ Important Disclaimer
The results provided by this calculator are estimates based on general statistical models. Psilocybin tolerance varies significantly from person to person due to individual metabolism and brain chemistry.
Most users report that effective experiences are possible again after just 7 days, as the majority of tolerance fades within the first week. However, a complete biological reset to baseline (zero tolerance) typically takes between 10 to 14 days depending on your physiology.
For safe application and harm reduction guidelines, read more here .
Frequently Asked Questions
A mushroom tolerance calculator is a tool designed to estimate the dosage increase required to achieve the same psychedelic effects as a previous trip. Since the body builds rapid tolerance to psilocybin, this tool uses mathematical formulas to calculate the necessary adjustment based on the exact number of days since your last ingestion.
Psilocybin tolerance typically takes 10 to 14 days to fully return to baseline (zero). Tolerance spikes immediately after use, often requiring nearly double the dose if consumed the very next day. Your serotonin receptors gradually recover their sensitivity over this two-week period.
For the most effective experience without wasting product, you should wait at least 14 days between trips. While calculators can help you dose sooner by increasing the amount, a full two-week break ensures your body and mind have reset, guaranteeing the maximum potency of your magic mushrooms.
Yes, but treat the results as estimations, not medical rules. Individual metabolism and brain chemistry vary. Always start low and go slow. If the calculator suggests a very high dose (e.g., 3x normal), proceed with caution, as psychological intensity may not scale exactly in parallel with physical tolerance.
Yes, there is significant cross-tolerance between LSD and psilocybin mushrooms because both affect the same 5-HT2A serotonin receptors. If you have recently taken LSD, you should use the mushroom tolerance calculator to adjust your dose, as the receptor downregulation applies to both substances equally.
Yes, even small microdoses can build tolerance if taken daily. This is why most microdosing protocols (like the Fadiman protocol) recommend a schedule of one day on, two days off. These break days allow your receptors to reset, preventing tolerance buildup and maintaining the effectiveness of the microdose.