How much caffeine is in a Monster?

How much caffeine is in each Monster?

Monster’s United States site listed 52 drinks on 10 November 2026, and each product page states one caffeine figure. The lowest is 140 mg and the highest is 300 mg: 23 drinks state 160 mg, 17 state 150 mg, 6 state 200 mg, 2 state 300 mg, 2 state 140 mg, and one each states 145 mg and 180 mg. The count is ours, made from the 52 pages. 6144145146147148149150151152153154155156157158159160

So the famous number is right for the green can and for fewer than half of the others. A chart that copies one figure across every flavor gets the rest wrong. Every row below was read off Monster’s own page for that drink on 10 November 2026, and where a page says something awkward, the awkward thing is in the table.

“A Monster” isn’t an order. It’s a genre

How much caffeine is in a white Monster?

The white can, Zero Ultra, states 150 mg for a 16 fl oz can. That is less than the green original, not the same. That is the first easy mistake.

The second is assuming every Ultra matches it. Fifteen other flavors do. Ultra Red is lower at 140 mg and Ultra Red White Blue Razz is higher at 160 mg. And Monster Energy Zero Sugar is a different drink from Zero Ultra: it keeps the green can’s 160 mg.

White Monster is a personality, not a dose

Which Monster has the most caffeine?

Killer Brew, at 300 mg in a 15 fl oz can. It sits in the Java Monster line, wears nearly the same name as the Java Monster flavors Mean Bean and Loca Moca, comes in the same size can, and carries half as much again: Java Monster states 200 mg. Do not hand the higher figure to all of Java Monster: Monster’s own pages do not.

By our arithmetic Killer Brew works out to 20 mg per fl oz, double the original’s 10 mg per fl oz. The lightest cans on the site are Ultra Red and Lo-Carb at 140 mg each.

If you remember one thing from this page, make it this: read the front of a coffee-flavored Monster twice.

Monster vs Red Bull: which has more caffeine?

Per can, Monster, because the usual Monster is about twice the size of the usual Red Bull: 160 mg in 16 fl oz against 80 mg in 8.4 fl oz. Put them in the same 16 fl oz can and Red Bull states 151 mg, which is 9 mg less. Per fl oz they are close to the same drink. Every Red Bull can and flavor is in the Red Bull article.

Reign states 300 mg per 16 oz can on its own FAQ, and Celsius Essentials 270 mg beside a “16 OUNCES” label, so both can be compared per fl oz. C4’s carbonated page sells two can sizes and does not tie its 200 mg to one. A 5-hour Energy shot is stated as 200 mg, or 230 mg at extra strength. 168166170171196204

C4 and the shot stay out of the chart on purpose. A per-can figure with no can size cannot be compared per fl oz, and guessing the size would be printing a guess as a fact. Reign, Celsius Essentials and the cans that tie at the top are ranked in which energy drink has the most caffeine. More cans and colas are on the drinks page, and the cola question has its own article.

Is a Monster stronger than a coffee?

Stronger than a home mug, weaker than a coffee-shop one. Our filter coffee is 80 mg in a 200 ml cup, so a green Monster is two of those. Starbucks is another matter: its US menu states 315 mg to 390 mg for a grande brewed coffee, the same 16 fl oz as the can.

The scariest can in the fridge still loses to a grande

That is the honest case for the can: you know what you got. The number on the label counts the caffeine from every source in it.

Under the American Beverage Association’s guidance, a voluntary commitment whose signatories include Monster and Red Bull, an energy drink’s label declares the total caffeine from all sources in the can, apart from the ingredient list. The association says its members represented 94% of the US energy drink category in 2024. Monster’s own advisory reads: “Not recommended for children, people sensitive to caffeine, pregnant women or women who are nursing.” 164163

How much caffeine is in a 24 oz Monster?

Monster’s US site does not say. Any chart that prints a figure for the big can from those pages is filling a gap, however confident it looks.

Monster sells Original Green and Zero Ultra in 12, 16, 19.2 and 24 oz cans in the United States, but each product page prints a single caffeine figure, “based on 16 fl oz”. Choosing another size on the page does not change it, so Monster’s site states no caffeine figure for the 12, 19.2 or 24 oz can. 6145

If Monster’s larger and smaller cans hold the same drink at the same strength as the 16 fl oz can, which Monster’s site does not state, original Monster works out to 10 mg per fl oz: about 120 mg in a 12 fl oz can and about 240 mg in a 24 fl oz can. This is our arithmetic, not a figure Monster publishes. 6

A figure for the big can worked out from Monster’s site is that multiplication, not a number Monster publishes there. It is probably close. It is still a sum, and the can in your hand is the only place the real number is printed. Read the label and trust it over any chart, this one included.

In the United Kingdom, Monster states 160 mg of caffeine for a 500 ml can of Original Green and 150 mg for a 500 ml can of Ultra, the white one. The UK pages print no figure per 100 ml, and say figures may vary by region. 161162

How many Monsters a day is too many?

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, two 16 fl oz cans of original Monster add up to 320 mg and three to 480 mg. Two Java Monsters make 400 mg, and two Killer Brews make 600 mg. These are sums of Monster’s own per-can figures and count nothing else drunk that day. 6153155

So two green cans fit under the line, one small coffee on top lands exactly on it, and the third can crosses it. The line is for a whole day. For one sitting, EFSA’s figure is 200 mg, which a single Killer Brew passes on its own. Neither number is a cliff. People differ a lot in how fast they clear caffeine, and the half-life matters as much as the can does.

The better question is when. Caffeine’s half-life in healthy adults averages 4 hours and runs as long as 8 hours, so an afternoon can is still in the room at midnight. The chart below is drawn at five hours, the instrument’s default, which you can drag.

Tonight’s sleep was decided at 3 pm