Reign Storm has more caffeine than Red Bull on both counts: 200mg per 12 oz can against 80mg per 8.4 oz can, and about 17mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.
Red Bull vs Reign Storm: the numbers
| Red Bull | Reign Storm | |
|---|---|---|
| Caffeine per serving | 80mg per 8.4 oz can | 200mg per 12 oz can |
| Caffeine per fl oz | 9.5mg | 16.7mg |
| Servings to reach 400mg (FDA context) | 5.0 | 2.0 |
Sources: Red Bull's figure is verified in our Red Bull caffeine guide against Red Bull label / Caffeine Informer (source); Reign Storm's figure is verified in our Reign Storm guide against Caffeine Informer (source).
Which one should you pick?
Pick Red Bull when you want the lighter dose or a slower ramp, and Reign Storm 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
- Red Bull: the full caffeine guide
- Reign Storm: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
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FAQ
Does Red Bull or Reign Storm have more caffeine? Reign Storm: 200mg per 12 oz can versus 80mg per 8.4 oz can for Red Bull.
Which is stronger per ounce? Reign Storm, at about 16.7mg per fluid ounce versus 9.5mg for Red Bull.
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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