Dunkin iced coffee (medium) has more caffeine than instant coffee on both counts: 297mg per 24 oz medium against 57mg per 8 oz cup, and about 12mg per fluid ounce against 7. The serving sizes differ, so the table below shows both ways of counting.
instant coffee vs Dunkin iced coffee (medium): the numbers
| instant coffee | Dunkin iced coffee (medium) | |
|---|---|---|
| Caffeine per serving | 57mg per 8 oz cup | 297mg per 24 oz medium |
| Caffeine per fl oz | 7.1mg | 12.4mg |
| Servings to reach 400mg (FDA context) | 7.0 | 1.3 |
Sources: instant coffee's figure is verified in our instant coffee caffeine guide against Caffeine Informer (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 instant coffee 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
- instant coffee: 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 instant coffee or Dunkin iced coffee (medium) have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 57mg per 8 oz cup for instant coffee.
Which is stronger per ounce? Dunkin iced coffee (medium), at about 12.4mg per fluid ounce versus 7.1mg for instant coffee.
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