Sun Drop has more caffeine than Dr Pepper: 64mg vs 41mg in the same 12 oz can. That is a 23mg gap, and since the cans match, the per-serving number is the whole story.
Dr Pepper vs Sun Drop: the numbers
| Dr Pepper | Sun Drop | |
|---|---|---|
| Caffeine per serving | 41mg per 12 oz can | 64mg per 12 oz can |
| Caffeine per fl oz | 3.4mg | 5.3mg |
| Servings to reach 400mg (FDA context) | 9.8 | 6.2 |
Sources: Dr Pepper's figure is verified in our Dr Pepper caffeine guide against KDP product facts / Caffeine Informer (source); Sun Drop's figure is verified in our Sun Drop guide against Caffeine Informer (source).
Which one should you pick?
Pick Dr Pepper when you want the lighter dose or a slower ramp, and Sun Drop 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
- Dr Pepper: the full caffeine guide
- Sun Drop: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Dr Pepper or Sun Drop have more caffeine? Sun Drop: 64mg per 12 oz can versus 41mg per 12 oz can for Dr Pepper.
Which is stronger per ounce? Sun Drop, at about 5.3mg per fluid ounce versus 3.4mg for Dr Pepper.
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.