A standard 8.4 oz can of Red Bull contains 80mg of caffeine, a number Red Bull prints on the can and publishes on its own site. The larger cans scale at the same rate: a 12 oz can lands at roughly 114mg and a 16 oz can at roughly 151mg. Treat the big-can numbers as label-rate approximations rather than lab-verified values.
The number everyone gets wrong
Red Bull's caffeine per ounce (about 9.5mg) is actually lower than brewed coffee's (typically 12mg or more per ounce). The energy feel comes from the combination of caffeine, sugars, and taurine, not from an unusually high caffeine dose. Sugar Free and Zero carry the same caffeine as the classic can per the label.
Red Bull caffeine by can size
| Can | Size | Caffeine |
|---|---|---|
| Red Bull (classic, Sugar Free, or Zero) | 8.4 oz | 80mg |
| Red Bull | 12 oz | ~114mg (label rate) |
| Red Bull | 16 oz | ~151mg (label rate) |
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. How caffeine affects you depends on your own tolerance and health, so treat these numbers as information, not advice.
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.
How Red Bull compares
One 8.4 oz Red Bull sits well under a grande drip. Compare it against Starbucks caffeine content and Dunkin's lineup, or see how cold brew changes the caffeine math before you pick your afternoon fix.
Looking for a different drink? The full caffeine database has every chain and can we have verified, including Monster.
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Gear from this guide
FAQ
How much caffeine is in a 12 oz Red Bull? About 114mg, scaling the labeled 80mg per 8.4 oz rate. Red Bull does not publish a separate lab value for the larger cans.
Does Sugar Free Red Bull have less caffeine? No. Sugar Free and Zero list the same 80mg per 8.4 oz as the classic can.
Is Red Bull stronger than coffee? Per ounce, no. Red Bull runs about 9.5mg per ounce; brewed coffee typically runs 12mg or more per ounce.
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