Bang has more caffeine than Reign Storm on both counts: 300mg per 16 oz can against 200mg per 12 oz can, and about 19mg per fluid ounce against 17. The serving sizes differ, so the table below shows both ways of counting.
Bang vs Reign Storm: the numbers
| Bang | Reign Storm | |
|---|---|---|
| Caffeine per serving | 300mg per 16 oz can | 200mg per 12 oz can |
| Caffeine per fl oz | 18.8mg | 16.7mg |
| Servings to reach 400mg (FDA context) | 1.3 | 2.0 |
Sources: Bang's figure is verified in our Bang caffeine guide against Caffeine Informer (source); Reign Storm's figure is verified in our Reign Storm guide against Caffeine Informer (source).
Which one should you pick?
Pick Reign Storm when you want the lighter dose or a slower ramp, and Bang 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
FAQ
Does Bang or Reign Storm have more caffeine? Bang: 300mg per 16 oz can versus 200mg per 12 oz can for Reign Storm.
Which is stronger per ounce? Bang, at about 18.8mg per fluid ounce versus 16.7mg for Reign Storm.
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.