5-hour Energy (regular) has more caffeine than Dunkin Sparkd Energy (medium) on both counts: 200mg per 1.93 oz shot against 144mg per 24 oz medium, and about 104mg per fluid ounce against 6. The serving sizes differ, so the table below shows both ways of counting.
5-hour Energy (regular) vs Dunkin Sparkd Energy (medium): the numbers
| 5-hour Energy (regular) | Dunkin Sparkd Energy (medium) | |
|---|---|---|
| Caffeine per serving | 200mg per 1.93 oz shot | 144mg per 24 oz medium |
| Caffeine per fl oz | 103.6mg | 6.0mg |
| Servings to reach 400mg (FDA context) | 2.0 | 2.8 |
Sources: 5-hour Energy (regular)'s figure is verified in our 5-hour Energy (regular) caffeine guide against 5-hour Energy facts page (source); Dunkin Sparkd Energy (medium)'s figure is verified in our Dunkin Sparkd Energy (medium) guide against Caffeine Informer Dunkin guide (source).
The concentration gap is the striking part: 5-hour Energy (regular) packs roughly 17 times the caffeine per ounce. Sipping speed matters at that density; a 1.93 oz shot finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Dunkin Sparkd Energy (medium) when you want the lighter dose or a slower ramp, and 5-hour Energy (regular) 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
- 5-hour Energy (regular): the full caffeine guide
- Dunkin Sparkd Energy (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does 5-hour Energy (regular) or Dunkin Sparkd Energy (medium) have more caffeine? 5-hour Energy (regular): 200mg per 1.93 oz shot versus 144mg per 24 oz medium for Dunkin Sparkd Energy (medium).
Which is stronger per ounce? 5-hour Energy (regular), at about 103.6mg 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.