Starbucks Cappuccino has more caffeine than Coca-Cola Classic on both counts: 150mg per 16 oz grande against 34mg per 12 oz can, and about 9mg per fluid ounce against 3. 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.
Starbucks Cappuccino vs Coca-Cola Classic: the numbers
| Starbucks Cappuccino | Coca-Cola Classic | |
|---|---|---|
| Caffeine per serving | 150mg per 16 oz grande | 34mg per 12 oz can |
| Caffeine per fl oz | 9.4mg | 2.8mg |
| Servings to reach 400mg (FDA context) | 2.7 | 11.8 |
Sources: Starbucks Cappuccino's figure is verified in our Starbucks Cappuccino caffeine guide against Starbucks nutrition listing (source); Coca-Cola Classic's figure is verified in our Coca-Cola Classic guide against Caffeine Informer (source).
The concentration gap is the striking part: Starbucks Cappuccino packs roughly 3 times the caffeine per ounce. Sipping speed matters at that density; a 16 oz grande finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Coca-Cola Classic when you want the lighter dose or a slower ramp, and Starbucks Cappuccino 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 Cappuccino: the full caffeine guide
- Coca-Cola Classic: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Starbucks Cappuccino or Coca-Cola Classic have more caffeine? Starbucks Cappuccino: 150mg per 16 oz grande versus 34mg per 12 oz can for Coca-Cola Classic.
Which is stronger per ounce? Starbucks Cappuccino, at about 9.4mg per fluid ounce versus 2.8mg for Coca-Cola Classic.
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