Rockstar Original vs Java Monster: which has more caffeine?

Java Monster has more caffeine than Rockstar Original 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.

Rockstar Original vs Java Monster: the numbers

Sources: Rockstar Original's figure is verified in our Rockstar Original caffeine guide against Rockstar product page (source); Java Monster's figure is verified in our Java Monster guide against Caffeine Informer (source).

Which one should you pick?

Pick Rockstar Original 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

• Rockstar Original: the full caffeine guide
• Java Monster: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index

FAQ

Does Rockstar Original or Java Monster have more caffeine? Java Monster: 200mg per 15 oz can versus 160mg per 16 oz can for Rockstar Original.

Which is stronger per ounce? Java Monster, at about 13.3mg per fluid ounce versus 10.0mg for Rockstar Original.