Dunkin iced coffee (medium) has more caffeine than Starbucks Caffe Latte on both counts: 297mg per 24 oz medium against 150mg per 16 oz grande, and about 12mg per fluid ounce against 9. The serving sizes differ, so the table below shows both ways of counting.
Starbucks Caffe Latte vs Dunkin iced coffee (medium): the numbers
| Starbucks Caffe Latte | Dunkin iced coffee (medium) | |
|---|---|---|
| Caffeine per serving | 150mg per 16 oz grande | 297mg per 24 oz medium |
| Caffeine per fl oz | 9.4mg | 12.4mg |
| Servings to reach 400mg (FDA context) | 2.7 | 1.3 |
Sources: Starbucks Caffe Latte's figure is verified in our Starbucks Caffe Latte caffeine guide against Starbucks nutrition listing (source); Dunkin iced coffee (medium)'s figure is verified in our Dunkin iced coffee (medium) guide against Caffeine Informer Dunkin guide (source).
Which one should you pick?
Pick Starbucks Caffe Latte when you want the lighter dose or a slower ramp, and Dunkin iced coffee (medium) 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 Caffe Latte: the full caffeine guide
- Dunkin iced coffee (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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FAQ
Does Starbucks Caffe Latte or Dunkin iced coffee (medium) have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 150mg per 16 oz grande for Starbucks Caffe Latte.
Which is stronger per ounce? Dunkin iced coffee (medium), at about 12.4mg per fluid ounce versus 9.4mg for Starbucks Caffe 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.
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