Dunkin hot coffee (medium) has more caffeine than Red Bull on both counts: 210mg per 14 oz medium against 80mg per 8.4 oz can, and about 15mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.
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 hot coffee (medium) vs Red Bull: the numbers
| Dunkin hot coffee (medium) | Red Bull | |
|---|---|---|
| Caffeine per serving | 210mg per 14 oz medium | 80mg per 8.4 oz can |
| Caffeine per fl oz | 15.0mg | 9.5mg |
| Servings to reach 400mg (FDA context) | 1.9 | 5.0 |
Sources: Dunkin hot coffee (medium)'s figure is verified in our Dunkin hot coffee (medium) caffeine guide against Tasting Table / Dunkin figures (source); Red Bull's figure is verified in our Red Bull guide against Red Bull label / Caffeine Informer (source).
Which one should you pick?
Pick Red Bull when you want the lighter dose or a slower ramp, and Dunkin hot 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 hot coffee (medium): the full caffeine guide
- Red Bull: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Dunkin hot coffee (medium) or Red Bull have more caffeine? Dunkin hot coffee (medium): 210mg per 14 oz medium versus 80mg per 8.4 oz can for Red Bull.
Which is stronger per ounce? Dunkin hot coffee (medium), at about 15.0mg per fluid ounce versus 9.5mg for Red Bull.
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.