brewed black tea has more caffeine than Arizona Green Tea: 47mg vs 7.5mg in the same 8 oz cup. That is a 39.5mg gap, and since the cans match, the per-serving number is the whole story.
brewed black tea vs Arizona Green Tea: the numbers
| brewed black tea | Arizona Green Tea | |
|---|---|---|
| Caffeine per serving | 47mg per 8 oz cup | 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) |
| Caffeine per fl oz | 5.9mg | 0.9mg |
| Servings to reach 400mg (FDA context) | 8.5 | 53.3 |
Sources: brewed black tea's figure is verified in our brewed black tea caffeine guide against USDA FoodData Central (source); Arizona Green Tea's figure is verified in our Arizona Green Tea guide against Arizona published figure / Caffeine Informer (source).
The concentration gap is the striking part: brewed black tea packs roughly 6 times the caffeine per ounce. Sipping speed matters at that density; a 8 oz cup finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Arizona Green Tea when you want the lighter dose or a slower ramp, and brewed black tea when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- brewed black tea: the full caffeine guide
- Arizona Green Tea: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does brewed black tea or Arizona Green Tea have more caffeine? brewed black tea: 47mg per 8 oz cup versus 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) for Arizona Green Tea.
Which is stronger per ounce? brewed black tea, at about 5.9mg per fluid ounce versus 0.9mg for Arizona Green Tea.
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.