Kill Cliff Ignite vs Rockstar Original: which has more caffeine?

Rockstar Original carries more total caffeine per serving (160mg per 16 oz can vs 150mg per 12 oz can), but ounce for ounce Kill Cliff Ignite is actually the stronger drink at about 12mg per fluid ounce against 10. Which one "has more caffeine" depends on whether you measure the container or the concentration.

Kill Cliff Ignite vs Rockstar Original: the numbers

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

Which one should you pick?

Pick Kill Cliff Ignite when you want the lighter dose or a slower ramp, and Rockstar Original 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

• Kill Cliff Ignite: the full caffeine guide
• Rockstar Original: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Kill Cliff Ignite or Rockstar Original have more caffeine? Rockstar Original: 160mg per 16 oz can versus 150mg per 12 oz can for Kill Cliff Ignite.

Which is stronger per ounce? Kill Cliff Ignite, at about 12.5mg per fluid ounce versus 10.0mg for Rockstar Original.