Pepsi has more caffeine than Squirt (original): 38mg vs 0mg in the same 12 oz can. That is a 38mg gap, and since the cans match, the per-serving number is the whole story.
Pepsi vs Squirt (original): the numbers
| Pepsi | Squirt (original) | |
|---|---|---|
| Caffeine per serving | 38mg per 12 oz can | 0mg per 12 oz can |
| Caffeine per fl oz | 3.2mg | 0.0mg |
| Servings to reach 400mg (FDA context) | 10.5 | n/a (caffeine-free) |
Sources: Pepsi's figure is verified in our Pepsi caffeine guide against Caffeine Informer (source); Squirt (original)'s figure is verified in our Squirt (original) guide against Caffeine Informer (source).
The concentration gap is the striking part: Pepsi packs roughly 317 times the caffeine per ounce. Sipping speed matters at that density; a 12 oz can finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Squirt (original) when you want the lighter dose or a slower ramp, and Pepsi 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
- Pepsi: the full caffeine guide
- Squirt (original): the full caffeine guide
- The verified caffeine database
FAQ
Does Pepsi or Squirt (original) have more caffeine? Pepsi: 38mg per 12 oz can versus 0mg per 12 oz can for Squirt (original).
Which is stronger per ounce? Pepsi, at about 3.2mg per fluid ounce versus 0.0mg for Squirt (original).
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.