Big Red has more caffeine than Arizona Green Tea on both counts: 34mg per 12 oz can against 7.5mg per 8 oz serving (23 oz can holds ~21.5mg), and about 3mg 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.
Big Red vs Arizona Green Tea: the numbers
| Big Red | Arizona Green Tea | |
|---|---|---|
| Caffeine per serving | 34mg per 12 oz can | 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) |
| Caffeine per fl oz | 2.8mg | 0.9mg |
| Servings to reach 400mg (FDA context) | 11.8 | 53.3 |
Sources: Big Red's figure is verified in our Big Red caffeine guide against Caffeine Informer (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: Big Red packs roughly 3 times the caffeine per ounce. Sipping speed matters at that density; a 12 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 Big Red 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
- Big Red: the full caffeine guide
- Arizona Green Tea: the full caffeine guide
- The verified caffeine database
FAQ
Does Big Red or Arizona Green Tea have more caffeine? Big Red: 34mg per 12 oz can versus 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) for Arizona Green Tea.
Which is stronger per ounce? Big Red, at about 2.8mg 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.