ZOA vs Java Monster: which has more caffeine?

Java Monster carries more total caffeine per serving (200mg per 15 oz can vs 160mg per 12 oz can), but ounce for ounce ZOA is actually the stronger drink at about 13mg per fluid ounce against 13. Which one "has more caffeine" depends on whether you measure the container or the concentration.

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.

ZOA vs Java Monster: the numbers

Sources: ZOA's figure is verified in our ZOA caffeine guide against ZOA FAQ (source); Java Monster's figure is verified in our Java Monster guide against Caffeine Informer (source).

Which one should you pick?

Pick ZOA 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

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

FAQ

Does ZOA or Java Monster have more caffeine? Java Monster: 200mg per 15 oz can versus 160mg per 12 oz can for ZOA.

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