What is the half-life of caffeine?

The half-life of caffeine is about 5-7 hours. That means, if you drink 200 mg of coffee at 2 in the afternoon, 100 mg of it is still active in your body by 7-9 at night.

Somnus procuratio

Capulus et somnus

Vide quam nuper-nocte capulus somnum tuum rumpit?

Medically Reviewed:

Dr. Priya Sammani, MBBS, PG Dip. FM

Updated on: April 2026

❓ Frequently Asked Questions (FAQ)

Quid est vita dimidia Julius?

Vita dimidia Julius fere 5-7 horarum est. Id est, si 200 mg potionis bibis hora 2 post meridiem, 100 mg eius adhuc agit in corpore tuo per 7-9 nocte.

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Mundus Salus Organizatio (WHO) et internationaliter agnita sunt normas medicinae clinicae et aequationes vexillum.

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Medical Disclaimer: These calculators are provided for educational purposes only and are not a substitute for professional medical advice. Always consult a qualified physician regarding any health concerns..