Tea
How much caffeine is in Black tea?
48 mgListed amount per 8 fl oz / 237 ml
Tea caffeine varies with the leaves, water temperature and brewing time.
How long might it remain?
Using the calculator’s five-hour half-life model, this serving would take approximately 4.7 hours to fall below 25 mg. This is a mathematical estimate, not a measurement of your body.
Product formulations can change. Check the current package or menu for the serving you consumed.
Calculate with 48 mg