Cira › Drinks › Tea

Caffeine in tea

Tea sits between 0 and 84 mg a cup. The plant is the same for black, green, white and oolong, so the colour on the box tells you less than the brew time does.

Drink	Serving	Caffeine	Time to clear	Latest for an 11 pm bedtime
Yerba mate	8 oz cup (240 ml)	84 mg	6 and a half hours	4:42 pm
Matcha	8 oz cup (240 ml)	67 mg	4 and a half hours	6:34 pm
Black tea	8 oz cup (240 ml)	48 mg	1 and a half hours	9:18 pm
Oolong	8 oz cup (240 ml)	38 mg	already clear	any time
White tea	8 oz cup (240 ml)	36 mg	already clear	any time
Chai latte	10.1 oz cup (300 ml)	30 mg	already clear	any time
Green tea	8 oz cup (240 ml)	29 mg	already clear	any time
Herbal tea	8 oz cup (240 ml)	0 mg	already clear	any time

Black, green, white and oolong are all Camellia sinensis, processed differently. The old rule that white tea has the least caffeine does not survive measurement: white tea uses young buds, which are the most caffeinated part of the plant. Matcha and yerba mate are the outliers for the same reason, you swallow the leaf instead of straining it out. Only herbal infusions are genuinely caffeine free, because they are not tea at all.

8 oz cup (240 ml)

8 oz cup (240 ml)

8 oz cup (240 ml)

8 oz cup (240 ml)