Dunkin' Extra Charged (medium) has more caffeine than C4 Performance Energy on both counts: 252mg per 14 oz medium against 200mg per 16 oz can, and about 18mg per fluid ounce against 12. 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' Extra Charged (medium) vs C4 Performance Energy: the numbers
| Dunkin' Extra Charged (medium) | C4 Performance Energy | |
|---|---|---|
| Caffeine per serving | 252mg per 14 oz medium | 200mg per 16 oz can |
| Caffeine per fl oz | 18.0mg | 12.5mg |
| Servings to reach 400mg (FDA context) | 1.6 | 2.0 |
Sources: Dunkin' Extra Charged (medium)'s figure is verified in our Dunkin' Extra Charged (medium) caffeine guide against Caffeine Informer (source); C4 Performance Energy's figure is verified in our C4 Performance Energy guide against Caffeine Informer (source).
Which one should you pick?
Pick C4 Performance Energy when you want the lighter dose or a slower ramp, and Dunkin' Extra Charged (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' Extra Charged (medium): the full caffeine guide
- C4 Performance Energy: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Dunkin' Extra Charged (medium) or C4 Performance Energy have more caffeine? Dunkin' Extra Charged (medium): 252mg per 14 oz medium versus 200mg per 16 oz can for C4 Performance Energy.
Which is stronger per ounce? Dunkin' Extra Charged (medium), at about 18.0mg per fluid ounce versus 12.5mg for C4 Performance Energy.
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.