Dunkin iced coffee (medium) has more caffeine than Starbucks Caramel Frappuccino on both counts: 297mg per 24 oz medium against 90mg per 16 oz grande, and about 12mg per fluid ounce against 6. The serving sizes differ, so the table below shows both ways of counting.
Starbucks Caramel Frappuccino vs Dunkin iced coffee (medium): the numbers
| Starbucks Caramel Frappuccino | Dunkin iced coffee (medium) | |
|---|---|---|
| Caffeine per serving | 90mg per 16 oz grande | 297mg per 24 oz medium |
| Caffeine per fl oz | 5.6mg | 12.4mg |
| Servings to reach 400mg (FDA context) | 4.4 | 1.3 |
Sources: Starbucks Caramel Frappuccino's figure is verified in our Starbucks Caramel Frappuccino 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 Caramel Frappuccino 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 Caramel Frappuccino: 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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Gear from this guide
FAQ
Does Starbucks Caramel Frappuccino or Dunkin iced coffee (medium) have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 90mg per 16 oz grande for Starbucks Caramel Frappuccino.
Which is stronger per ounce? Dunkin iced coffee (medium), at about 12.4mg per fluid ounce versus 5.6mg for Starbucks Caramel Frappuccino.
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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