brewed oolong tea has more caffeine than Peace Tea on both counts: 37mg per 8 oz cup against 23mg per 23 oz can, and about 5mg per fluid ounce against 1. The serving sizes differ, so the table below shows both ways of counting.
brewed oolong tea vs Peace Tea: the numbers
| brewed oolong tea | Peace Tea | |
|---|---|---|
| Caffeine per serving | 37mg per 8 oz cup | 23mg per 23 oz can |
| Caffeine per fl oz | 4.6mg | 1.0mg |
| Servings to reach 400mg (FDA context) | 10.8 | 17.4 |
Sources: brewed oolong tea's figure is verified in our brewed oolong tea caffeine guide against USDA FoodData Central (source); Peace Tea's figure is verified in our Peace Tea guide against Caffeine Informer (source).
The concentration gap is the striking part: brewed oolong tea packs roughly 5 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 Peace Tea when you want the lighter dose or a slower ramp, and brewed oolong 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 oolong tea: the full caffeine guide
- Peace Tea: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does brewed oolong tea or Peace Tea have more caffeine? brewed oolong tea: 37mg per 8 oz cup versus 23mg per 23 oz can for Peace Tea.
Which is stronger per ounce? brewed oolong tea, at about 4.6mg per fluid ounce versus 1.0mg for Peace 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.