Rockstar Original has more caffeine than Arizona Green Tea on both counts: 160mg per 16 oz can against 7.5mg per 8 oz serving (23 oz can holds ~21.5mg), and about 10mg per fluid ounce against 1. The serving sizes differ, so the table below shows both ways of counting.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Rockstar Original vs Arizona Green Tea: the numbers
| Rockstar Original | Arizona Green Tea | |
|---|---|---|
| Caffeine per serving | 160mg per 16 oz can | 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) |
| Caffeine per fl oz | 10.0mg | 0.9mg |
| Servings to reach 400mg (FDA context) | 2.5 | 53.3 |
Sources: Rockstar Original's figure is verified in our Rockstar Original caffeine guide against Rockstar product page (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: Rockstar Original packs roughly 11 times the caffeine per ounce. Sipping speed matters at that density; a 16 oz can 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 Rockstar Original 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
- Rockstar Original: the full caffeine guide
- Arizona Green Tea: the full caffeine guide
- The verified caffeine database
FAQ
Does Rockstar Original or Arizona Green Tea have more caffeine? Rockstar Original: 160mg per 16 oz can versus 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) for Arizona Green Tea.
Which is stronger per ounce? Rockstar Original, at about 10.0mg per fluid ounce versus 0.9mg for Arizona Green Tea.
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