C4 Performance Energy has more caffeine than brewed coffee on both counts: 200mg per 16 oz can against 95mg per 8 oz cup, and about 12mg 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.
brewed coffee vs C4 Performance Energy: the numbers
| brewed coffee | C4 Performance Energy | |
|---|---|---|
| Caffeine per serving | 95mg per 8 oz cup | 200mg per 16 oz can |
| Caffeine per fl oz | 11.9mg | 12.5mg |
| Servings to reach 400mg (FDA context) | 4.2 | 2.0 |
Sources: brewed coffee's figure is verified in our brewed coffee caffeine guide against USDA FoodData Central (source); C4 Performance Energy's figure is verified in our C4 Performance Energy guide against Caffeine Informer (source).
Which one should you pick?
Pick brewed coffee when you want the lighter dose or a slower ramp, and C4 Performance Energy 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
- brewed coffee: the full caffeine guide
- C4 Performance Energy: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does brewed coffee or C4 Performance Energy have more caffeine? C4 Performance Energy: 200mg per 16 oz can versus 95mg per 8 oz cup for brewed coffee.
Which is stronger per ounce? C4 Performance Energy, at about 12.5mg per fluid ounce versus 11.9mg for brewed coffee.
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.