Starbucks Chai Latte has more caffeine than Peace Tea on both counts: 95mg per 16 oz grande against 23mg per 23 oz can, 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 Peace Tea: the numbers
| Starbucks Chai Latte | Peace Tea | |
|---|---|---|
| Caffeine per serving | 95mg per 16 oz grande | 23mg per 23 oz can |
| Caffeine per fl oz | 5.9mg | 1.0mg |
| Servings to reach 400mg (FDA context) | 4.2 | 17.4 |
Sources: Starbucks Chai Latte's figure is verified in our Starbucks Chai Latte caffeine guide against Starbucks nutrition listing (source); Peace Tea's figure is verified in our Peace Tea guide against 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 Peace 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
- Peace 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 Peace Tea have more caffeine? Starbucks Chai Latte: 95mg per 16 oz grande versus 23mg per 23 oz can for Peace Tea.
Which is stronger per ounce? Starbucks Chai Latte, at about 5.9mg 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.
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