brewed green tea has more caffeine than Fresca on both counts: 28mg per 8 oz cup against 0mg per 12 oz can, and about 4mg per fluid ounce against 0. 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.
Fresca vs brewed green tea: the numbers
| Fresca | brewed green tea | |
|---|---|---|
| Caffeine per serving | 0mg per 12 oz can | 28mg per 8 oz cup |
| Caffeine per fl oz | 0.0mg | 3.5mg |
| Servings to reach 400mg (FDA context) | n/a (caffeine-free) | 14.3 |
Sources: Fresca's figure is verified in our Fresca caffeine guide against Coca-Cola product facts (source); brewed green tea's figure is verified in our brewed green tea guide against USDA FoodData Central (source).
The concentration gap is the striking part: brewed green tea packs roughly 350 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 Fresca when you want the lighter dose or a slower ramp, and brewed green 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
- Fresca: the full caffeine guide
- brewed green tea: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Fresca or brewed green tea have more caffeine? brewed green tea: 28mg per 8 oz cup versus 0mg per 12 oz can for Fresca.
Which is stronger per ounce? brewed green tea, at about 3.5mg per fluid ounce versus 0.0mg for Fresca.
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