Caffeine Half-Life

Calculate when your bloodstream will clear enough adenosine blockers to permit optimal N3 deep sleep.

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Assumption: Average caffeine half-life is 5.7 hours. A 200mg coffee at 8 AM leaves ~42mg in your system by 10 PM, enough to fragment architecture.

Dose (mg)

Standard cup of coffee is ~100mg. Pre-workout is ~250mg.

Hours until Sleep Block

Genetic Metabolism Rate

Caffeine Half-Life

Residual Caffeine at Bedtime