International Delight iced coffee has more caffeine than Mountain Dew: 88mg vs 54mg in the same 12 oz serving. That is a 34mg 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.
Mountain Dew vs International Delight iced coffee: the numbers
| Mountain Dew | International Delight iced coffee | |
|---|---|---|
| Caffeine per serving | 54mg per 12 oz can | 88mg per 12 oz serving |
| Caffeine per fl oz | 4.5mg | 7.3mg |
| Servings to reach 400mg (FDA context) | 7.4 | 4.5 |
Sources: Mountain Dew's figure is verified in our Mountain Dew caffeine guide against Caffeine Informer (source); International Delight iced coffee's figure is verified in our International Delight iced coffee guide against Caffeine Informer (source).
Which one should you pick?
Pick Mountain Dew when you want the lighter dose or a slower ramp, and International Delight iced coffee 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
- Mountain Dew: the full caffeine guide
- International Delight iced coffee: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Mountain Dew or International Delight iced coffee have more caffeine? International Delight iced coffee: 88mg per 12 oz serving versus 54mg per 12 oz can for Mountain Dew.
Which is stronger per ounce? International Delight iced coffee, at about 7.3mg per fluid ounce versus 4.5mg for Mountain Dew.
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.