G Fuel Energy (can) has more caffeine than Dunkin iced coffee (medium) on both counts: 300mg per 16 oz can against 297mg per 24 oz medium, and about 19mg per fluid ounce against 12. 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.
G Fuel Energy (can) vs Dunkin iced coffee (medium): the numbers
| G Fuel Energy (can) | Dunkin iced coffee (medium) | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 297mg per 24 oz medium |
| Caffeine per fl oz | 18.8mg | 12.4mg |
| Servings to reach 400mg (FDA context) | 1.3 | 1.3 |
Sources: G Fuel Energy (can)'s figure is verified in our G Fuel Energy (can) caffeine guide against G Fuel product page (source); Dunkin iced coffee (medium)'s figure is verified in our Dunkin iced coffee (medium) guide against Caffeine Informer Dunkin guide (source).
Which one should you pick?
Pick Dunkin iced coffee (medium) when you want the lighter dose or a slower ramp, and G Fuel Energy (can) 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
- G Fuel Energy (can): the full caffeine guide
- Dunkin iced coffee (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does G Fuel Energy (can) or Dunkin iced coffee (medium) have more caffeine? G Fuel Energy (can): 300mg per 16 oz can versus 297mg per 24 oz medium for Dunkin iced coffee (medium).
Which is stronger per ounce? G Fuel Energy (can), at about 18.8mg per fluid ounce versus 12.4mg for Dunkin iced coffee (medium).
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