Celsius has more caffeine than Red Thunder (Aldi): 200mg vs 120mg in the same 12 oz can. That is a 80mg gap, and since the cans match, the per-serving number is the whole story.
Red Thunder (Aldi) vs Celsius: the numbers
| Red Thunder (Aldi) | Celsius | |
|---|---|---|
| Caffeine per serving | 120mg per 12 oz can | 200mg per 12 oz can |
| Caffeine per fl oz | 10.0mg | 16.7mg |
| Servings to reach 400mg (FDA context) | 3.3 | 2.0 |
Sources: Red Thunder (Aldi)'s figure is verified in our Red Thunder (Aldi) caffeine guide against Caffeine Informer (source); Celsius's figure is verified in our Celsius guide against Celsius essential facts (source).
Which one should you pick?
Pick Red Thunder (Aldi) when you want the lighter dose or a slower ramp, and Celsius 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 Thunder (Aldi): the full caffeine guide
- Celsius: 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 Red Thunder (Aldi) or Celsius have more caffeine? Celsius: 200mg per 12 oz can versus 120mg per 12 oz can for Red Thunder (Aldi).
Which is stronger per ounce? Celsius, at about 16.7mg per fluid ounce versus 10.0mg for Red Thunder (Aldi).
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