Starbucks Chai Latte has more caffeine than Ito En Teas' Tea (oolong) on both counts: 95mg per 16 oz grande against 70mg per 16.9 oz bottle, and about 6mg per fluid ounce against 4. The serving sizes differ, so the table below shows both ways of counting.
Ito En Teas' Tea (oolong) vs Starbucks Chai Latte: the numbers
| Ito En Teas' Tea (oolong) | Starbucks Chai Latte | |
|---|---|---|
| Caffeine per serving | 70mg per 16.9 oz bottle | 95mg per 16 oz grande |
| Caffeine per fl oz | 4.1mg | 5.9mg |
| Servings to reach 400mg (FDA context) | 5.7 | 4.2 |
Sources: Ito En Teas' Tea (oolong)'s figure is verified in our Ito En Teas' Tea (oolong) caffeine guide against Caffeine Informer (source); Starbucks Chai Latte's figure is verified in our Starbucks Chai Latte guide against Starbucks nutrition listing (source).
Which one should you pick?
Pick Ito En Teas' Tea (oolong) when you want the lighter dose or a slower ramp, and Starbucks Chai Latte 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
- Ito En Teas' Tea (oolong): the full caffeine guide
- Starbucks Chai Latte: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Ito En Teas' Tea (oolong) or Starbucks Chai Latte have more caffeine? Starbucks Chai Latte: 95mg per 16 oz grande versus 70mg per 16.9 oz bottle for Ito En Teas' Tea (oolong).
Which is stronger per ounce? Starbucks Chai Latte, at about 5.9mg per fluid ounce versus 4.1mg for Ito En Teas' Tea (oolong).
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