Dunkin iced coffee (medium) has more caffeine than Dunkin Refresher (medium): 297mg vs 99mg in the same 24 oz medium. That is a 198mg gap, and since the cans match, the per-serving number is the whole story.
Dunkin iced coffee (medium) vs Dunkin Refresher (medium): the numbers
| Dunkin iced coffee (medium) | Dunkin Refresher (medium) | |
|---|---|---|
| Caffeine per serving | 297mg per 24 oz medium | 99mg per 24 oz medium |
| Caffeine per fl oz | 12.4mg | 4.1mg |
| Servings to reach 400mg (FDA context) | 1.3 | 4.0 |
Sources: Dunkin iced coffee (medium)'s figure is verified in our Dunkin iced coffee (medium) caffeine guide against Caffeine Informer Dunkin guide (source); Dunkin Refresher (medium)'s figure is verified in our Dunkin Refresher (medium) guide against Tasting Table / Dunkin figures (source).
The concentration gap is the striking part: Dunkin iced coffee (medium) packs roughly 3 times the caffeine per ounce. Sipping speed matters at that density; a 24 oz medium finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Dunkin Refresher (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 Refresher (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Dunkin iced coffee (medium) or Dunkin Refresher (medium) have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 99mg per 24 oz medium for Dunkin Refresher (medium).
Which is stronger per ounce? Dunkin iced coffee (medium), at about 12.4mg per fluid ounce versus 4.1mg for Dunkin Refresher (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.