Dunkin iced coffee (medium) carries more total caffeine per serving (297mg per 24 oz medium vs 170mg per 12 oz serving), but ounce for ounce SToK Extra Bold cold brew is actually the stronger drink at about 14mg per fluid ounce against 12. Which one "has more caffeine" depends on whether you measure the container or the concentration.
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 SToK Extra Bold cold brew: the numbers
| Dunkin iced coffee (medium) | SToK Extra Bold cold brew | |
|---|---|---|
| Caffeine per serving | 297mg per 24 oz medium | 170mg per 12 oz serving |
| Caffeine per fl oz | 12.4mg | 14.2mg |
| Servings to reach 400mg (FDA context) | 1.3 | 2.4 |
Sources: Dunkin iced coffee (medium)'s figure is verified in our Dunkin iced coffee (medium) caffeine guide against Caffeine Informer Dunkin guide (source); SToK Extra Bold cold brew's figure is verified in our SToK Extra Bold cold brew guide against SToK FAQ (source).
Which one should you pick?
Pick SToK Extra Bold cold brew 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
- SToK Extra Bold cold brew: the full caffeine guide
- The verified caffeine database
FAQ
Does Dunkin iced coffee (medium) or SToK Extra Bold cold brew have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 170mg per 12 oz serving for SToK Extra Bold cold brew.
Which is stronger per ounce? SToK Extra Bold cold brew, at about 14.2mg per fluid ounce versus 12.4mg for Dunkin iced coffee (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.