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Home » How Much Caffeine Is In A Monster? (Yes, It Sounds Scary)

How Much Caffeine Is In A Monster? (Yes, It Sounds Scary)

Monster Energy has some intense branding. The almost dripping “M” on the sides of the cans kind of looks like it’s shaking from too much caffeine.

But does the branding match the insides? Just how much caffeine is in a Monster energy drink? And does that match the caffeine content of regular old coffee? The answers might actually surprise you. Monster drinks have much less caffeine than the branding makes it seem.

This article is all about breaking down the caffeine content of Monster Energy drinks, so let’s dive straight in.

Caffeine in Monster Canada

What Is A Monster?

Monster is one of the most recognizable brands of energy drinks on the market today (1). You can find Monster Energy drinks at just about every convenience store and gas station.

Monster Energy drinks are a range of energy drinks that combine sugar, caffeine, and carbonation to create an energizing and delicious soda with an extra energy boost.

In short, Monster drinks are just another soda that advertises a quick energy boost through caffeine and sugar. But don’t be fooled, all energy drinks are pretty bad for you, and we don’t recommend relying on them for energy (2).

Types of Monster Drinks

There are a ton of Monsters in the lineup. But they can be broken down into a few categories:

  • Original Monster. These are the classics, what Monster started with back in the day. These flavours have all the sugar and all the caffeine.
  • Monster Ultra. The Ultra lineup is the sugar-free version of the originals. They have similar amounts of caffeine but without any sugar.
  • Java Monster. It’s what it sounds like a blend of coffee and Monster energy. Recommended for the adventurous only.
  • Punch Monster. These are combinations of fruit juices and Monster energy blends.
  • Rehab Monster. Monster drinks for when you need electrolytes and energy at the same time.

Pretty much all Monster drinks have at least some caffeine. And the serving of caffeine is certainly different from the per-can amount of caffeine.

How Much Caffeine Is In A Monster Energy Drink?

Your run-of-the-mill, classic 473 ml Monster Energy drink has 166 mg of caffeine, which is higher than in the same product in the US (3). That’s quite a bit of caffeine. If you’re not used to it or not expecting it, you’ll probably be left feeling jittery or anxious. Kind of like taking caffeine pills instead of getting caffeine through a drink.

But there are other types of Monster drinks out there, so let’s dive into a few of them and look at how much caffeine each of them has.

How Much Caffeine In Monster Zero Sugar

Monster Zero is the no-sugar version of the classic Monster drink. But does having no sugar also mean less caffeine?

Yes, by a little bit.

A Monster Zero has 26 mg less caffeine than the regular Monster. That means Monster Zero has 140 mg of caffeine. That’s still pretty high, but not nearly as high as the 166 mg in a regular Monster. But that’s actually not too much.

Up to 400 milligrams of caffeine a day appears to be safe for most healthy adults.

The amount of caffeine in a Monster Zero is well within the safe amount of caffeine per day. But there’s another type of Monster Zero: Monster Zero Ultra. Does that have a different amount of caffeine?

How Much Caffeine Is In A Monster Zero Ultra

Monster Zero Ultra is another of the Monster zero-sugar lineup, but with a slightly different flavour profile.

The Monster Zero Ultra has quite a bit less caffeine than both the regular Monster and the Monster Zero Sugar. The Zero Ultra has 137 mg of caffeine.

The best recommendation is to choose the three based on flavour rather than caffeine content. The caffeine content isn’t enough to make a huge difference.

How Much Caffeine Is In A 24 Oz Monster Energy Drink

In Canada, Monster Energy drinks are available in 473 ml or 355 ml cans. However, if you buy imported flavours, you might see different sizes, including 24 oz (710 ml).

There’s a whopping 244 mg of caffeine in a 24 oz Monster.

That’s a ton of caffeine. Someone who drinks a few cups of coffee daily might still feel jittery if they had a 24 oz Monster Energy drink instead. But it all comes down to the coffee vs soda debate about the caffeine content.

But that begs another question: how much caffeine is in coffee vs Monster Energy drinks?

Caffeine In A Monster Energy Drink Vs Coffee

Let’s look at the most standard Monster Energy drink: the regular 473 ml can. That regular can has 160 mg of caffeine. That’s pretty high, but what amount of caffeine is in a standard cup of coffee?
A 480 ml cup of black coffee actually comes in significantly higher than the Monster, with up to 280 mg of caffeine. Keep in mind, however, that the type of bean, roast, and origin will slightly alter that caffeine content, so it’s not an exact number. For example, one of the world’s strongest coffees has over 700 mg per 360 ml serving.

Coffee won’t give you electrolytes, but it also doesn’t have harmful ingredients.

An espresso is a much better option if you’re looking for a low-caffeine alternative to Monster drinks. Espresso has only about 60 mg of coffee per shot.

The bottom line is that coffee and Monster have a similar amount of caffeine, but coffee is a better option for your health.

Final Thoughts

Monster Energy drinks don’t have quite as much caffeine as it might seem just by looking at the branding. But that doesn’t mean they don’t pack a punch.

On average, Monster Energy drinks have about 160 mg of caffeine per 473 ml can. That’s less than drinking two cups of coffee.

The truth is that Monster Energy drinks are harmful simply for the amount of caffeine they contain. And as with anything, moderation is key.


For a healthy adult, 300 mg of caffeine is on the upper end of what’s considered healthy. A healthy adult should consume only 400 mg of caffeine daily.

One energy drink a day is within the recommended intake of caffeine. However, the other ingredients in your energy drink might make it less advisable.

Monster Energy will last for about two hours before the effects of the extra caffeine start to wear off. That’s plenty of time to focus on your project or task.

  1. Baker, N. (2023, January 5). The 10 largest energy drink companies in the world…and the 5 biggest brands in the U.S. VinePair. Retrieved March 27, 2023, from https://vinepair.com/booze-news/top-energy-drink-companies/
  2. Heger, E., & Cassetty, S. (2022, May 26). 4 reasons why energy drinks are bad for you – and Healthier Ways To Boost Your Energy. Insider. Retrieved March 27, 2023, from https://www.insider.com/guides/health/diet-nutrition/are-energy-drinks-bad-for-you/
  3. Monster energy. Caffeine Informer. (n.d.). Retrieved March 27, 2023, from https://www.caffeineinformer.com/caffeine-content/monster/
Craig C.
My three favorite things in life are coffee, rock climbing, and spending time outside. I'm part of the AeroPress fan club and an advocate for the Oxford comma.

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