Rockstar Original has more caffeine than Starbucks Caffe Latte: 160mg vs 150mg in the same 16 oz can. That is a 10mg 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 Caffe Latte vs Rockstar Original: the numbers
| Starbucks Caffe Latte | Rockstar Original | |
|---|---|---|
| Caffeine per serving | 150mg per 16 oz grande | 160mg per 16 oz can |
| Caffeine per fl oz | 9.4mg | 10.0mg |
| Servings to reach 400mg (FDA context) | 2.7 | 2.5 |
Sources: Starbucks Caffe Latte's figure is verified in our Starbucks Caffe Latte caffeine guide against Starbucks nutrition listing (source); Rockstar Original's figure is verified in our Rockstar Original guide against Rockstar product page (source).
Which one should you pick?
Pick Starbucks Caffe Latte when you want the lighter dose or a slower ramp, and Rockstar Original 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 Caffe Latte: the full caffeine guide
- Rockstar Original: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Starbucks Caffe Latte or Rockstar Original have more caffeine? Rockstar Original: 160mg per 16 oz can versus 150mg per 16 oz grande for Starbucks Caffe Latte.
Which is stronger per ounce? Rockstar Original, at about 10.0mg per fluid ounce versus 9.4mg for Starbucks Caffe Latte.
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.
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