Red Bull has more caffeine than Sparkling Ice +Caffeine on both counts: 80mg per 8.4 oz can against 70mg per 16 oz can, and about 10mg per fluid ounce against 4. The serving sizes differ, so the table below shows both ways of counting.
Sparkling Ice +Caffeine vs Red Bull: the numbers
| Sparkling Ice +Caffeine | Red Bull | |
|---|---|---|
| Caffeine per serving | 70mg per 16 oz can | 80mg per 8.4 oz can |
| Caffeine per fl oz | 4.4mg | 9.5mg |
| Servings to reach 400mg (FDA context) | 5.7 | 5.0 |
Sources: Sparkling Ice +Caffeine's figure is verified in our Sparkling Ice +Caffeine caffeine guide against Caffeine Informer (source); Red Bull's figure is verified in our Red Bull guide against Red Bull label / Caffeine Informer (source).
Which one should you pick?
Pick Sparkling Ice +Caffeine when you want the lighter dose or a slower ramp, and Red Bull 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
- Sparkling Ice +Caffeine: the full caffeine guide
- Red Bull: 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 Sparkling Ice +Caffeine or Red Bull have more caffeine? Red Bull: 80mg per 8.4 oz can versus 70mg per 16 oz can for Sparkling Ice +Caffeine.
Which is stronger per ounce? Red Bull, at about 9.5mg per fluid ounce versus 4.4mg for Sparkling Ice +Caffeine.
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