AriZona green tea has about 7.5mg of caffeine per 8oz, which works out to roughly 22mg in the classic 23oz tallboy can. That is the number straight from AriZona's own caffeine breakdown, and it makes their green tea one of the lowest caffeine ready-to-drink teas on the shelf. Black tea flavors run double that, and the Rx Stress and Kidz lines have none.
Here is the short version if you are standing in front of the cooler: green tea is light, black tea is moderate, white tea is lighter still, red tea is caffeine free, and only the Rx Energy can actually hits you with a real dose.
Why AriZona reads lower than you expect
AriZona brews with real tea leaves, so the caffeine is whatever naturally steeps out, not an added stimulant. Their published baseline is 15mg per 8oz for black teas and 7.5mg per 8oz for green teas. For comparison, an 8oz cup of drip coffee lands somewhere around 95 to 120mg, so even a full green tea can is a fraction of one small coffee.
The catch is serving size. Nobody drinks 8oz of an AriZona. The big can is 23oz and the tall bottles are 20oz, so you multiply that little per-serving number by two or three. A 23oz green tea is still gentle, but a 23oz black tea flavor like Lemon Tea or Peach Tea gets you into cola territory. The table below lists the sizes AriZona publishes so you can scale from there.
AriZona caffeine by flavor
| Product | Serving | Caffeine |
|---|---|---|
| Green Tea (all flavors) | 8 fl oz | 7.5mg |
| Green Tea (all flavors) | 16 fl oz | 15mg |
| Black Tea (all flavors, incl. Lemon, Peach) | 8 fl oz | 15mg |
| Black Tea (all flavors) | 16 fl oz | 30mg |
| White Tea (all flavors) | 16 fl oz | 12mg |
| Arnold Palmer Half & Half (black tea) | 20 fl oz | 37.5mg |
| Half & Half Green Tea Lemonade | 20 fl oz | 19mg |
| Rx Energy Herbal Tea | 20 fl oz | 75mg |
| Rx Stress Herbal Tea | 16 fl oz | 0mg |
| Kidz Teas | 10 fl oz | 0mg |
Source: AriZona caffeine content, Caffeine Informer, matching AriZona's published FAQ figures of 15mg per 8oz for black tea and 7.5mg per 8oz for green tea. Red tea is naturally decaffeinated. Rx Energy is the only line with added guarana and ginseng, which is why it clears 75mg.
To scale for the can in your hand, take the 8oz number and multiply. A 23oz green tea is about 22mg, a 23oz black tea flavor is about 43mg, and a 34oz jug of black tea is roughly 64mg. Green tea powder mixes and the tea bags AriZona sells prepare at their own rates, so they will not match the ready-to-drink cans.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. How caffeine affects you depends on your own tolerance and health, so treat these numbers as information, not advice.
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Related caffeine reads
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- The full Barista Life caffeine database for every drink we have measured.
FAQ
Does AriZona green tea have a lot of caffeine? No. It is about 7.5mg per 8oz, so even a 23oz can sits near 22mg, which is well under a quarter of a small coffee.
Which AriZona has the most caffeine? The Rx Energy Herbal Tea at 75mg per 20oz can, because it adds guarana and ginseng. Among the plain teas, black tea flavors top out highest at 15mg per 8oz.
Is any AriZona tea caffeine free? Yes. The red tea line is naturally decaffeinated, and the Rx Stress and Kidz teas are listed at 0mg.