How much caffeine is in a Red Bull?
A standard 8.4 oz Red Bull has 80 mg of caffeine. See every can size, how it compares to coffee, and how to cut back.
A standard 8.4 oz (250 ml) Red Bull has about 80 mg of caffeine, roughly the same as a small cup of coffee. Larger cans scale up from there, and Sugarfree and Zero have the same caffeine as the original.
| Red Bull | Size | Caffeine |
|---|---|---|
| Original can | 8.4 oz | 80 mg |
| The Bigger Can | 12 oz | 114 mg |
| The Bigger Can | 16 oz | 151 mg |
| Sugarfree / Zero | 8.4 oz | 80 mg |
A single 8.4 oz Red Bull (80 mg) sits well under the ~400 mg daily limit most healthy adults are advised to stay below, but a 16 oz can plus coffee adds up fast. Add up your whole day with the free Caffeine Calculator, or see how it stacks up against a Monster.
Compare other energy drinks
See the caffeine in Monster, 5-Hour Energy, Celsius, Prime Energy, Bang, Alani Nu, C4 Energy.
Written by Mike Zagare · Published
Mike Zagare is the founder of Knuckle. He tapered off a 500 to 600mg-a-day habit and built Knuckle from that protocol.
Common questions
Is 80 mg of caffeine a lot?
Not for most healthy adults; it's about one small coffee. But it's a meaningful dose if you're caffeine-sensitive, pregnant, or drinking it late in the day.
Does Sugarfree Red Bull have less caffeine?
No. Sugarfree and Zero have the same ~80 mg per 8.4 oz as the original; only the sugar differs.
Red Bull vs coffee: which has more caffeine?
An 8 oz brewed coffee (~95 mg) usually has a bit more than an 8.4 oz Red Bull (80 mg).
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