How much caffeine is in a Red Bull?

How much caffeine is in a Red Bull, by can size?

The classic slim can is 8.4 fl oz and holds 80 mg. From there Red Bull sells three bigger cans in the US, and the caffeine rises roughly in step with the liquid. By our arithmetic every size lands between 9.4 mg per fl oz and 9.9 mg per fl oz. A bigger Red Bull is mostly more Red Bull, and only the biggest can is a touch stronger.

Keep an eye on the 20 fl oz can. It is the one that walks right up to the limits further down this page, and in one country over them, if the can counts as one serving.

Do Sugarfree, Zero and the Red Bull Editions have the same caffeine?

On 11 November 2026, all 20 product pages on Red Bull’s US site, Red Bull Energy Drink, Sugarfree, Zero and 17 Editions (11 with sugar, 6 sugar-free), state 80 mg of caffeine per 8.4 fl oz can. The Energy Drink and Sugarfree pages list 8.4, 12, 16 and 20 fl oz cans; Zero and the Editions list 8.4 and 12 fl oz, and none of those pages states the caffeine in its 12 fl oz can. 268269270271272273274275276277278279280281282283284285286287

Watermelon, juneberry, white peach, pistachio: the flavor moves, the caffeine does not. Red Bull’s own product pages say so, one by one.

Red Bull says “All Red Bull Editions contain the same functional ingredients as Red Bull Energy Drink: caffeine, taurine and B-group vitamins”, and that some Editions, “often released seasonally”, are sold “only for a limited time”. 292

Every US Red Bull flavor is the same dose in a costume

So Sugarfree versus Zero is a question about sweeteners, and sugar versus no sugar is a question about sugar. The caffeine does not care which can you picked.

Per 8.4 fl oz can, Red Bull states 26 g of sugars for Red Bull Energy Drink, 27 g for the Red Edition and 0 g for Sugarfree and for Zero, and 80 mg of caffeine for all four. Sugarfree is sweetened with acesulfame potassium and sucralose; Zero with monk fruit extract, sucralose and erythritol. 10291289290

Is a Red Bull stronger than a cup of coffee?

Red Bull’s answer is no: it calls the small can about the same as a cup of home-brewed coffee. Then it prints a chart, on the same page, that disagrees.

Red Bull’s US ingredients page says the 80 mg of caffeine in an 8.4 fl oz can of Red Bull Energy Drink “is about the same amount as in a cup of home-brewed coffee”. The chart beside that sentence gives home-brewed coffee as “~95 mg” per 8 fl oz, and names its source as the “USDA National Nutrient Database for Standard References”. Red Bull’s US caffeine FAQ uses the same “about the same” wording. 109

By Red Bull’s own US chart, a cup of home-brewed coffee (~95 mg per 8 fl oz) holds 15 mg more caffeine than the 80 mg can Red Bull calls about the same, so the can is about 84% of the chart’s cup. Red Bull’s 50 mg Pakistan drink, also “about the same” as a cup of coffee, holds 30 mg less than the US can. These differences are our arithmetic. 10293

Red Bull says a can is about the same as a cup of coffee, then prints a chart where the coffee wins

To be fair to the can, the cup decides it. The 95 mg on Red Bull’s chart matches USDA’s brewed coffee: 95 mg (71–104 mg) for an 8 fl oz cup by our arithmetic, and anywhere from 71 mg to 104 mg across USDA’s samples. Our own filter coffee is a smaller 200 ml cup at 80 mg, and against that cup the can really is the same. Against a mug, it loses. Both are on the drinks page.

And the phrase travels. Red Bull’s Pakistan site sells a different drink and uses the same comparison for it.

Red Bull’s Pakistan site sells Red Bull Stimulant Drink and says “The 50 mg of caffeine contained in one 250 ml can of Red Bull Stimulant Drink is about the same amount as in a cup of coffee.” 293

Red Bull’s “cup of coffee” changes size at the border

Red Bull vs Monster: which has more caffeine?

Per can, Monster, because the usual Monster is about twice the size: 160 mg in 16 fl oz against 80 mg in 8.4 fl oz. Put them in the same 16 fl oz can and the gap almost closes.

In the same 16 fl oz can, Red Bull states 151 mg of caffeine and Monster states 160 mg: a difference of 9 mg. 69

Per fl oz, by our arithmetic, that is 10 mg per fl oz for Monster against 9.4 mg per fl oz for Red Bull. Nearly the same drink, in different clothes. Every Monster is in its own article, and the rest of the fridge is in which energy drink has the most caffeine. The one thing stronger per sip than any can is not a can: it is the energy shot.

Is the caffeine on a Red Bull label accurate?

A label is a claim. USDA’s nutrient database holds an analyzed record for Red Bull, and it is public, so the claim can be checked against something other than Red Bull.

USDA’s analyzed record for Red Bull, published in 2019, gives 29 mg of caffeine per 100 g from 3 samples that ran from 29 to 30, and weighs the 8.4 fl oz can at 258 g. Multiplied out, that is about 74.8 mg a can, 77.4 mg at the highest sample, against the 80 mg on Red Bull’s label: 93.5% of the label, or 5.2 mg short. The multiplication is ours; USDA gives the figure per 100 g. 2969

So the lab came in a little under the label, not over it. Three samples is a small lab, and the record is for the original only. If you were hoping the can was secretly stronger than it says, USDA did not find that.

How many Red Bulls a day is safe?

EFSA concludes that caffeine intakes up to 400 mg a day from all sources, spread through the day, do not raise safety concerns for healthy adults, except pregnant women. FDA cites 400 mg a day for most adults as an amount not generally associated with negative effects, and notes wide variation in how sensitive people are to caffeine and how fast they eliminate it. 225

Against the 400 mg a day that EFSA and FDA cite for healthy adults, five 8.4 fl oz cans of Red Bull make exactly 400 mg, two 16 fl oz cans make 302 mg and three make 453 mg, and two 20 fl oz cans make 396 mg. These are sums of Red Bull’s own per-can figures and count nothing else drunk that day. 922

Five small cans land exactly on the line, which is a lot of small cans. The bigger cans get there faster. For one sitting, EFSA’s figure is 200 mg, and Red Bull’s biggest can stops just short of it, at 198 mg.

Red Bull’s US 20 fl oz can, at 198 mg, is 2 mg under the 200 mg single dose that EFSA says raises no safety concern for healthy non-pregnant adults, and, if the can is one serving, 18 mg over the 180 mg per serving Health Canada allows in an energy drink. The caffeine page on Red Bull’s Canadian site gives figures for 250, 355 and 473 ml cans only. The differences are our arithmetic. 922297294

Health Canada restricts the caffeine from all sources in a caffeinated energy drink to 180 mg per serving. Every such drink sold in Canada must say “high caffeine content” on the label, with the statements “Not recommended for those under 14 years old, pregnant or breastfeeding women or individuals sensitive to caffeine” and “Do not drink more than X serving(s) per day”. 297

Red Bull’s biggest can is over Canada’s limit if it’s one serving. I drink it in the car like a smuggler

Europe does not cap the can. It makes it say so next to the name.

In the European Union a drink with more than 150 mg of caffeine per liter, other than a coffee or tea named as such, must carry the words “High caffeine content. Not recommended for children or pregnant or breast-feeding women” in the same field of vision as its name, followed in brackets by the caffeine per 100 ml. It is a label rule, not a cap. 212

Red Bull’s New Zealand panel gives 32 mg of caffeine per 100 ml, which is 320 mg per liter, about 2.1 times the 150 mg per liter above which EU law requires the “High caffeine content” warning. The conversion and the ratio are our arithmetic. 295212

None of these numbers is a cliff. People clear caffeine at very different speeds, and the better question than how many is when. Caffeine’s half-life in healthy adults averages 4 hours and runs as long as 8 hours, so the afternoon can is still around at midnight. More on that in how long caffeine stays in your system.