Nootropic Dosage Based on Body Mass Calculator

Calculate scientifically accurate nootropic dosages tailored to your body weight, tolerance, and goals. Includes safety caps and frequency recommendations.

Select the nootropic you want to dose

Only if Custom selected above

Standard dosing per kg body weight (only for custom)

Affects stimulant dosing (caffeine, phenylpiracetam)

Dose (mg) = Base Dose per kg × Body Weight (kg) × Tolerance Multiplier × Sensitivity Multiplier. Caffeine: 3mg/kg, L-Theanine: 5.7mg/kg, Bacopa: 15mg/kg, Lion's Mane: 14.3mg/kg.
70kg person, Caffeine, medium tolerance, normal sensitivity: Dose = 3 × 70 × 1.3 × 1.0 = 273mg per dose (max 400mg/day). Frequency: 2-3× daily (5h half-life).

How is nootropic dosage calculated based on body weight?

Standard dosing follows the formula: Dose = Base Dose per kg × Body Weight. For example, Caffeine at 3mg/kg for a 70kg person = 210mg. This approximates clinical trial dosages which typically standardize by body mass. Adjustments are then made for tolerance, sensitivity, and goal.

What is the half-life and why does it matter?

Half-life is how long it takes for half the compound to be eliminated from your body. Caffeine (5h) clears faster than Bacopa (12h). Shorter half-life compounds may need multiple daily doses. Longer half-life compounds accumulate - take breaks to reset tolerance. Half-life determines dosing frequency.

Should I adjust for caffeine tolerance?

Yes. Regular caffeine users (daily) develop 50-70% tolerance. If you drink coffee daily, you may need 1.5-2× the standard dose for the same effect. However, exceeding 400mg caffeine daily is not recommended. Consider caffeine breaks every 2-3 months to reset tolerance.

What are the safety limits for nootropics?

Safe upper limits: Caffeine 400mg/day, L-Theanine 800mg/day, Alpha-GPC 600mg/day, Bacopa 3000mg/day (300mg bacosides), Lion's Mane 3000mg/day. Racetams require choline supplementation. Start with 50% dose, increase gradually. Consult healthcare provider before combining multiple stimulants.