Starbucks Blonde Roast has more caffeine than Mountain Dew on both counts: 360mg per 16 oz grande against 54mg per 12 oz can, and about 22mg per fluid ounce against 4. 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 Blonde Roast vs Mountain Dew: the numbers
| Starbucks Blonde Roast | Mountain Dew | |
|---|---|---|
| Caffeine per serving | 360mg per 16 oz grande | 54mg per 12 oz can |
| Caffeine per fl oz | 22.5mg | 4.5mg |
| Servings to reach 400mg (FDA context) | 1.1 | 7.4 |
Sources: Starbucks Blonde Roast's figure is verified in our Starbucks Blonde Roast caffeine guide against Starbucks nutrition listing (source); Mountain Dew's figure is verified in our Mountain Dew guide against Caffeine Informer (source).
The concentration gap is the striking part: Starbucks Blonde Roast packs roughly 5 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 Mountain Dew when you want the lighter dose or a slower ramp, and Starbucks Blonde Roast 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 Blonde Roast: the full caffeine guide
- Mountain Dew: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Starbucks Blonde Roast or Mountain Dew have more caffeine? Starbucks Blonde Roast: 360mg per 16 oz grande versus 54mg per 12 oz can for Mountain Dew.
Which is stronger per ounce? Starbucks Blonde Roast, at about 22.5mg per fluid ounce versus 4.5mg for Mountain Dew.
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