Java Monster has more caffeine than Monster on both counts: 200mg per 15 oz can against 160mg per 16 oz can, and about 13mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Monster vs Java Monster: the numbers
| Monster | Java Monster | |
|---|---|---|
| Caffeine per serving | 160mg per 16 oz can | 200mg per 15 oz can |
| Caffeine per fl oz | 10.0mg | 13.3mg |
| Servings to reach 400mg (FDA context) | 2.5 | 2.0 |
Sources: Monster's figure is verified in our Monster caffeine guide against Caffeine Informer (source); Java Monster's figure is verified in our Java Monster guide against Caffeine Informer (source).
Which one should you pick?
Pick Monster when you want the lighter dose or a slower ramp, and Java Monster 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
- Monster: the full caffeine guide
- Java Monster: the full caffeine guide
- The verified caffeine database
FAQ
Does Monster or Java Monster have more caffeine? Java Monster: 200mg per 15 oz can versus 160mg per 16 oz can for Monster.
Which is stronger per ounce? Java Monster, at about 13.3mg per fluid ounce versus 10.0mg for Monster.
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.