Dunkin iced coffee (medium) has more caffeine than Dunkin Sparkd Energy (medium): 297mg vs 144mg in the same 24 oz medium. That is a 153mg gap, and since the cans match, the per-serving number is the whole story.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Dunkin iced coffee (medium) vs Dunkin Sparkd Energy (medium): the numbers
| Dunkin iced coffee (medium) | Dunkin Sparkd Energy (medium) | |
|---|---|---|
| Caffeine per serving | 297mg per 24 oz medium | 144mg per 24 oz medium |
| Caffeine per fl oz | 12.4mg | 6.0mg |
| Servings to reach 400mg (FDA context) | 1.3 | 2.8 |
Sources: Dunkin iced coffee (medium)'s figure is verified in our Dunkin iced coffee (medium) caffeine guide against Caffeine Informer Dunkin guide (source); Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) guide against Caffeine Informer Dunkin guide (source).
Which one should you pick?
Pick Dunkin Sparkd Energy (medium) 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
- Dunkin iced coffee (medium): the full caffeine guide
- Dunkin Sparkd Energy (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Dunkin iced coffee (medium) or Dunkin Sparkd Energy (medium) have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 144mg per 24 oz medium for Dunkin Sparkd Energy (medium).
Which is stronger per ounce? Dunkin iced coffee (medium), at about 12.4mg per fluid ounce versus 6.0mg for Dunkin Sparkd Energy (medium).
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.