How much caffeine is in a Red Bull?

A classic 250 ml can holds 80 mg of caffeine — that’s the figure Red Bull publishes. Every other size follows the same concentration, which makes the arithmetic simple: 32 mg per 100 ml, whatever the can.

Size	Caffeine
250 ml / 8.4 fl oz (the classic can)	80 mg
355 ml / 12 fl oz	114 mg
473 ml / 16 fl oz	151 mg
591 ml / 20 fl oz	198 mg

Figures published by Red Bull, checked in August 2026. Recipes and formats change: the label on your can stays the reference.

The consequence fits in one sentence: the recipe doesn’t change from one size to the next, only the volume does. A 473 ml can isn’t a stronger drink, it’s nearly twice the same drink.

What doesn’t change the caffeine

Three variants people assume are lighter or stronger, and which hold exactly the same:

• Red Bull Sugarfree. Sugar is swapped for non-caloric sweeteners; caffeine stays at 80 mg per 250 ml.
• The flavoured Editions. Same caffeine as the original.
• Ice, dilution, mixing. Pouring a can over ice removes nothing: the caffeine you swallow is the can’s, not the glass’s.

In other words there’s no reduced-caffeine option in the range. The only lever is the size.

What does 80 mg actually mean?

It’s roughly one coffee, and that’s the comparison worth having:

Drink	Caffeine
Café espresso (25–30 ml)	60–80 mg
Red Bull, 250 ml	80 mg
Filter coffee, 240 ml mug	80–120 mg
Red Bull, 473 ml	151 mg
Can of cola, 355 ml	30–55 mg

So a classic can weighs about the same as an espresso across a counter, and less than a large mug of filter coffee. That’s often the reverse of what people assume.

One useful qualifier: France’s ANSES reports that a 250 ml can of energy drink delivers on average the caffeine of two espressos. That average covers the whole category, which climbs much higher at other brands — Red Bull sits at the low end of it. The full comparison is in energy drinks vs coffee.

Why it feels stronger than a coffee

Because caffeine isn’t the only thing at work. Three factors matter, and none of them is an extra milligram:

• The sugar. A classic 250 ml can carries about 27 g of it, and sugar arriving alongside caffeine feels different from a black coffee.
• The speed. A cold can goes down in minutes; a hot coffee gets sipped. At equal dose, what arrives fast hits harder.
• The context. These drinks are rarely consumed over a quiet breakfast.

The sensation is real, then, but it doesn’t come from a bigger dose of caffeine. It comes from how that dose arrives.

And taurine? It’s the most-discussed ingredient in the can and the least explanatory. EFSA examined the question in 2015 and judged negative interactions between caffeine and taurine unlikely at the levels present in these drinks. The B vitamins aren’t stimulants either — they play a role in energy metabolism, which is not the same thing as making you alert. What wakes you up is the caffeine; the rest is mostly recipe.

The “high caffeine content” statement

You’ll have read it on the can, in small type. It isn’t decorative: EU rules require it on any drink above 150 mg of caffeine per litre, tea and coffee excluded.

Red Bull runs at 320 mg per litre — more than double the threshold. The statement is therefore automatic, and it doesn’t flag an unusually loaded recipe: it flags a drink that is concentrated compared with a soda.

How many in a day?

The general reference point for a healthy adult is about 400 mg a day and 200 mg in a single sitting. In cans:

• Five 250 ml cans reach 400 mg.
• A single 591 ml can, at 198 mg, already brushes the 200 mg single-sitting mark.

Worth noting too, and unrelated to dose: ANSES advises against energy drinks for children and adolescents, pregnant and breastfeeding women, and people with certain cardiovascular, psychiatric or neurological conditions, and advises against combining them with alcohol or physical exercise. Its positions are covered in what ANSES says about caffeine.

What to take away

80 mg per 250 ml can, 32 mg per 100 ml at any size. Neither the sugar-free version nor the Editions change any of it: in this range the only variable is how big the can is.

And for the comparison everyone wants: a classic Red Bull is one coffee. Not two. To place the can against everything else you drink, the full table is in caffeine content by drink, and the daily reference point is in how much caffeine per day.

CaffIQ logs the can at its actual size — 250, 355 and 473 ml don’t count the same — and adds it to your coffees, so the day’s total is the one you really drank.

CaffIQ provides general estimates, not medical advice. For any health question, talk to a qualified professional.