Starbucks Chai Latte carries more total caffeine per serving (95mg per 16 oz grande vs 85mg per 8 oz cup), but ounce for ounce yerba mate is actually the stronger drink at about 11mg per fluid ounce against 6. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Starbucks Chai Latte vs yerba mate: the numbers
| Starbucks Chai Latte | yerba mate | |
|---|---|---|
| Caffeine per serving | 95mg per 16 oz grande | 85mg per 8 oz cup |
| Caffeine per fl oz | 5.9mg | 10.6mg |
| Servings to reach 400mg (FDA context) | 4.2 | 4.7 |
Sources: Starbucks Chai Latte's figure is verified in our Starbucks Chai Latte caffeine guide against Starbucks nutrition listing (source); yerba mate's figure is verified in our yerba mate guide against Caffeine Informer / compiled (source).
Which one should you pick?
Pick yerba mate 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
- yerba mate: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Starbucks Chai Latte or yerba mate have more caffeine? Starbucks Chai Latte: 95mg per 16 oz grande versus 85mg per 8 oz cup for yerba mate.
Which is stronger per ounce? yerba mate, at about 10.6mg per fluid ounce versus 5.9mg for Starbucks Chai Latte.
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.