Dunkin Sparkd Energy (medium) carries more total caffeine per serving (144mg per 24 oz medium vs 142mg per 12 oz can), but ounce for ounce UPTIME Energy is actually the stronger drink at about 12mg per fluid ounce against 6. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Dunkin Sparkd Energy (medium) vs UPTIME Energy: the numbers
| Dunkin Sparkd Energy (medium) | UPTIME Energy | |
|---|---|---|
| Caffeine per serving | 144mg per 24 oz medium | 142mg per 12 oz can |
| Caffeine per fl oz | 6.0mg | 11.8mg |
| Servings to reach 400mg (FDA context) | 2.8 | 2.8 |
Sources: Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) caffeine guide against Caffeine Informer Dunkin guide (source); UPTIME Energy's figure is verified in our UPTIME Energy guide against Caffeine Informer (source).
Which one should you pick?
Pick UPTIME Energy when you want the lighter dose or a slower ramp, and Dunkin Sparkd Energy (medium) 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
- Dunkin Sparkd Energy (medium): the full caffeine guide
- UPTIME Energy: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Dunkin Sparkd Energy (medium) or UPTIME Energy have more caffeine? Dunkin Sparkd Energy (medium): 144mg per 24 oz medium versus 142mg per 12 oz can for UPTIME Energy.
Which is stronger per ounce? UPTIME Energy, at about 11.8mg per fluid ounce versus 6.0mg for Dunkin Sparkd Energy (medium).
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.