Starbucks cold brew (grande) has more caffeine than C4 Performance Energy: 205mg vs 200mg in the same 16 oz grande. That is a 5mg gap, and since the cans match, the per-serving number is the whole story.
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.
Starbucks cold brew (grande) vs C4 Performance Energy: the numbers
| Starbucks cold brew (grande) | C4 Performance Energy | |
|---|---|---|
| Caffeine per serving | 205mg per 16 oz grande | 200mg per 16 oz can |
| Caffeine per fl oz | 12.8mg | 12.5mg |
| Servings to reach 400mg (FDA context) | 2.0 | 2.0 |
Sources: Starbucks cold brew (grande)'s figure is verified in our Starbucks cold brew (grande) caffeine guide against Starbucks menu data (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 Starbucks cold brew (grande) 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
- Starbucks cold brew (grande): the full caffeine guide
- C4 Performance Energy: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Starbucks cold brew (grande) or C4 Performance Energy have more caffeine? Starbucks cold brew (grande): 205mg per 16 oz grande versus 200mg per 16 oz can for C4 Performance Energy.
Which is stronger per ounce? Starbucks cold brew (grande), at about 12.8mg 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.