Tea caffeine planner
Add the cups you plan to drink. The planner totals the caffeine and estimates what remains at bedtime, using a half-life of about five hours. It is a rough estimate based on typical cup figures. It is not medical advice, and people differ a great deal.
Add a cup to see the totals.
Lower-caffeine choices
If you want tea later in the day, the lightest caffeinated teas in the catalogue include Lahpet (Burmese Fermented Tea) (0 mg), Cacao Husk Tea (5 mg), Cocoa Tea (Trinidad style) (12 mg), Hojicha (18 mg), Kukicha (Karigane) (18 mg). For none at all, filter the explorer to caffeine-free teas, or see the herbal teas.
Brewing also changes the figure: hotter water, more leaf and longer steeps extract more. See the brew calculator.