Starbucks Chai Latte has more caffeine than Arizona Green Tea on both counts: 95mg per 16 oz grande against 7.5mg per 8 oz serving (23 oz can holds ~21.5mg), and about 6mg per fluid ounce against 1. The serving sizes differ, so the table below shows both ways of counting.
Starbucks Chai Latte vs Arizona Green Tea: the numbers
| Starbucks Chai Latte | Arizona Green Tea | |
|---|---|---|
| Caffeine per serving | 95mg per 16 oz grande | 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) |
| Caffeine per fl oz | 5.9mg | 0.9mg |
| Servings to reach 400mg (FDA context) | 4.2 | 53.3 |
Sources: Starbucks Chai Latte's figure is verified in our Starbucks Chai Latte caffeine guide against Starbucks nutrition listing (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: Starbucks Chai Latte packs roughly 6 times the caffeine per ounce. Sipping speed matters at that density; a 16 oz grande 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 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
- Starbucks Chai Latte: the full caffeine guide
- Arizona Green Tea: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
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Gear from this guide
FAQ
Does Starbucks Chai Latte or Arizona Green Tea have more caffeine? Starbucks Chai Latte: 95mg per 16 oz grande versus 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) for Arizona Green Tea.
Which is stronger per ounce? Starbucks Chai Latte, at about 5.9mg 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.
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