IDEAFACTORYS LAB · Health

Caffeine Half-Life Calculator

Dose + time → residual caffeine mg (illustrative).

Intake

Educational only — not a sleep or medical judgment.

Residual ≈ dose × 0.5^(t/half-life). Default half-life 5h (varies a lot). Not medical advice.

Residual estimate

Residual mg—
Half-lives—
% of initial—