Dunkin hot coffee (medium) has more caffeine than Pepsi Zero Sugar on both counts: 210mg per 14 oz medium against 69mg per 12 oz can, and about 15mg per fluid ounce against 6. 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.
Pepsi Zero Sugar vs Dunkin hot coffee (medium): the numbers
| Pepsi Zero Sugar | Dunkin hot coffee (medium) | |
|---|---|---|
| Caffeine per serving | 69mg per 12 oz can | 210mg per 14 oz medium |
| Caffeine per fl oz | 5.8mg | 15.0mg |
| Servings to reach 400mg (FDA context) | 5.8 | 1.9 |
Sources: Pepsi Zero Sugar's figure is verified in our Pepsi Zero Sugar caffeine guide against PepsiCo product facts (source); Dunkin hot coffee (medium)'s figure is verified in our Dunkin hot coffee (medium) guide against Tasting Table / Dunkin figures (source).
Which one should you pick?
Pick Pepsi Zero Sugar 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
- Pepsi Zero Sugar: the full caffeine guide
- Dunkin hot coffee (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Pepsi Zero Sugar or Dunkin hot coffee (medium) have more caffeine? Dunkin hot coffee (medium): 210mg per 14 oz medium versus 69mg per 12 oz can for Pepsi Zero Sugar.
Which is stronger per ounce? Dunkin hot coffee (medium), at about 15.0mg per fluid ounce versus 5.8mg for Pepsi Zero Sugar.
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