The ULTIMATE Guide To How Much Caffeine Is In Energy Drinks

If you’ve ever wondered how much caffeine is in the most popular energy drinks available, this list is for you. This guide features 25 different energy drink options ranging from 350mg a drink to 260mg a drink.

Caffeine In Energy Drinks

Energy drinks are a great coffee alternative, whether you’re looking for something to enhance your workout, power you through a busy day, or keep you focused on the task at hand.

However, many times they also have some downsides, like excessive calories and/or added sugar. Also, if you aren’t keeping an eye on your caffeine consumption, you can easily consume too much and experience some adverse effects – like insomnia, nervousness, restlessness, increased heart rate, and nausea.

Anyway, this energy drink guide takes all of the caffeine guesswork out of the equation! It will tell you exactly how much caffeine there is in the most popular energy drinks – and it will also tell you their calories.

Also, just so you know, I organized the list based on the energy drinks with the highest caffeine content to the lowest.

Low Calorie Energy Drinks

1. Redline Xtreme Energy Drink

Redline’s claim to fame is their super fast-acting formula. Most people feel the energy boost within minutes of drinking it, so it’s a great option when you need to spike your energy levels as fast as possible. As an added benefit it also has 0 calories per bottle making it a great energy drink for weight loss too.

How much caffeine is in a Redline Xtreme energy drink?

An 8-ounce bottle of Redline Xtreme has 316mg of caffeine. That means every ounce of it packs 39.5mg of caffeine, making it the energy drink with the most caffeine per ounce – that isn’t an energy shot that is.

You can grab a 24-pack of the triple berry falvor here.

2. Redline Princess

Another powerful Redline energy drink – Redline Princess – is specifically made with weight loss in mind. It has the same fat-burning benefits as regular Redline, plus mood-enhancing and appetite-suppressing ingredients. Also, just like the “Xtreme” version, this one has 0 calories.

How much caffeine is in Redline Princess?

There are 300mg of caffeine in an 8-ounce bottle of Redline Princess. That equates to 37.5mg of caffeine per ounce, making it second to only Redline Xtreme in terms of the amount of caffeine it has by volume. Again though, this is true for energy drinks, not energy “shots”.

3. Spike Hardcore Energy Drink

Spike’s Hardcore energy drink is designed to be the ultimate pre-workout. It has more caffeine than 3 cups of coffee, and it’s also boosted with amino acids and vitamins. The result is longer-lasting energy with less fatigue, fewer jitters, and minimized caffeine crashes. Also, it only has 15 calories per can.

How Much Caffeine is in Spike’s Hardcore?

There are 350mg of caffeine in a 16 ounce can of Spike Hardcore. That means as far as 16-ounce energy drinks go, Spike has the most caffeine.

However, from a “caffeine per ounce” standpoint it only has 21.8mg of caffeine per ounce – that means it has almost half of the caffeine found in a Redline Xtreme.

You can pick up a 12-pack of the original flavor here.

4. Bang Energy

If you like having a ton of flavors to choose from, Bang Energy is one to look out for. Honestly, it comes in too many flavors to list, and new options come out all the time. I have to say though my favorite flavor is the cotton candy flavor.

Also, in addition to its high caffeine content, it’s made with creatine and BCAAs, so it’s an energy drink tailored to working out.

How much caffeine is in Bang?

A 16-ounce can of Bang has 300mg of caffeine. That makes it one of the most caffeinated 16-ounce energy drinks you can buy.

Speaking of buying it, you can pick up a 12-pack of one of their 24 flavors here.

5. Bang Sweet Tea

If you aren’t a fan of the fizzy carbonation most highly caffeinated energy drinks have, this high-energy sweet tea will be an absolute game-changer. Bang’s sweet tea line provides the same caffeine content as the classic Bang energy drinks, plus the same benefits of creatine and BCAAs, minus the bubbles.

Also, for what it’s worth, every 16-ounce can is totally calorie free.

How much caffeine is in Bang Sweet Tea?

There are 300mg of caffeine in Bang’s Sweet Tea energy drink. That means in terms of caffeination it’s on par with Bang’s “normal” energy drinks.

You can get a 12-pack of the original sweet tea here.

5. C4 Ultimate Energy Drink

Designed to be the ultimate pre-workout energy drink – they use the tagline “superhuman performance” for a reason – C4 Ultimate is made with clinically tested ingredients proven to positively impact performance. The formulation is geared towards maximizing rep counts, pumps, and of course, your energy level as well.

Also, what’s nice about C4 Ultimate is that it’s available in carbonated and non-carbonated options and both have 0 calories.

For what it’s worth, I prefer the non carbonated versions of this popular energy drink – my favorite being the Icy Blue Razz flavor.

How much caffeine is in C4 Ultimate?

There are 300mg of caffeine in a 16 ounce can of C4’s Ultimate energy drink. That means it’s right up there with some of the most caffeniated energy drinks on the market.

You can grab a 12-pack of the arctic snow cone flavor here.

6. GFuel Cans

GFuel is the energy drink of choice for most gamers and esports enthusiasts. It’s known for its collaborative flavors with famous internet personalities and pop culture icons, such as gaming streamer sensation Ninja.

In addition to caffeine, GFuel is made with a blend of immune-boosting ingredients, vitamins, and amino acids to power you through late-night gaming sessions. On top of all of that, it has 0 calories as well.

How much caffeine is in C4 Ultimate?

There are 300mg of caffeine in a 16-ounce serving of C4 Ultimate. And again, at 300mg per 16 ounces that makes C4 Ultimate one of the most caffeinated energy drinks you can sip on.

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You can get a 12-pack of the Ninja cotton candy flavor here.

7. Go Fast High Octane Energy Drink

Go Fast energy drinks are designed with sports enthusiasts and adrenaline junkies in mind. Their drinks are made with a unique herbal blend and natural ribose, so you can expect a smooth burst of energy and prolonged endurance without the crash or jitters.

How much caffeine is in Go Fast High Octane Energy?

There are 300mg of caffeine in a 16-ounce can of Go Fast High Octane Energy.

8. Liquid Help Energy Drink

With a name like Liquid Help, you can expect this energy drink to be the ultimate pick-me-up. In addition to the 300 mg of caffeine these cans deliver, this zero calorie energy drink is also packed with healthy B vitamins. In fact, each serving provides a good amount of vitamin B12 plus your daily recommended intake of vitamins B3, B6, and B5, making it one of the best healthy energy drinks out there.

How much caffeine is in Liquid Help?

There are 300mg of caffeine in 16 ounces of Liquid Help. That makes it on par with Bang, GFuel, and C4 in terms of its caffeine content.

9. Raze Energy Drink

Hydration and muscle recovery are key when it comes to a good workout, and Raze energy drinks definitely deliver on that front. Their drinks are made to keep you energized and hydrated through your workout and also to help you boost your post-workout recovery. Not to mention, every 16-ounce can of Raze has 0 calories and 0 grams of sugar.

How much caffeine is in Raze Energy?

There are 300mg of caffeine in a 16-ounce can of Raze Energy. This puts it on par with many of the other highly caffeinated energy drinks on the market.

You can grab a 12-pack of Raze here.

10. Reign Total Body Fuel

Reign Total Body Fuel is an energy drink made for people living an active lifestyle. It has everything you want in a workout drink, with CoQ10, BCAAS, electrolytes, and a bunch of natural caffeine to help you perform at your peak.

How much caffeine is in Reign Total Body Fuel?

There are 300mg of caffeine in a 16-ounce can of Reign Total Body Fuel.

You can up a 12-pack of the Reignbow sherbert flavor here.

11. Rockstar Thermo

This Rockstar energy drink doubles down on thermogenic properties. It’s made with almost twice the caffeine as their original energy drink, plus, it has added green tea extract to help you burn fat too. Along with all of that, Rockstar Thermo is loaded with amino acids as well.

How much caffeine is in Rockstar Thermo?

There are 300mg of caffeine in a 16-ounce can of Rockstar Thermo.

You can get a 12-pack of the watermelon kiwi flavor here.

12. C4 Energy

C4 Energy is one of the most well-known pre-workout powders, and they have an energy drink that delivers all of the same results! Just like the Ultimate C4 drink, the original comes in carbonated and non-carbonated flavors.

How much caffeine is in C4?

There are 200mg of caffeine in a 16-ounce can of C4.

You can get a 12-pack of the Skittles flavor here.

13. Ghost Energy

Ghost energy drinks are loaded with beneficial ingredients to give you a better workout. They have 1,000mg of carinpure carnitine and 100% of your daily intake of 4 different vitamins in each can.

Also, the cool thing about this energy drink is there are a ton of name-brand flavors, like Sour Patch Kids, and Swedish Fish Warheads.

You can get a 12-pack of the blue Sour Patch Kids flavor here.

How much caffeine is in Ghost?

There are 200mg of caffeine in a 16-ounce can of Ghost.

14. Hi-Ball Energy Seltzer

The Hi-Ball caffeinated seltzer provides a clean healthy energy drink without any of the junk. It’s made with organic caffeine, organic herbal extracts, and a healthy dose of B vitamins for a feel-good kick of energy that lasts for hours. Also, for what it’s worth it has 0 calories too.

How much caffeine is in Hi Ball Energy?

A 16-ounce can of Hi Ball Energy has 160mg of caffeine. It certainly doesn’t have a ton of caffeine – as far as energy drinks go anyway – so it’s a good option to go with if you’re looking for a pick-me up, but need a huge boost.

You can grab an 8-pack of the grapefruit flavor here.

15. Monster Energy Zero Ultra

This option from the ultra-popular energy drink brand Monster is their low calorie offering at just 10 calories a can. It also has double the amount of caffeine as their original energy drink and zero sugar.

How much caffeine is in a Monster Energy Zero Ultra?

There are 140mg of caffeine in a Monster Energy Zero Ultra. Again, just like with the High-Ball Energy Seltzer this is a good option if you need just a little pick-me-up. If you need a bigger boost you’ll want to grab one of the first 11 options I listed above – each of them has 300mg of caffeine.

You can get a 15-pack here.

16. Zevia Zero Calorie Energy

Finishing off our energy drinks list is Zevia Energy. It gets its name from Stevia, the zero calorie sweetener their energy drinks use, so it’s perfect if you have a big sweet tooth. This healthy energy drink is made with all-natural flavors and organic caffeine with no unnecessary preservatives or artificial ingredients, making it one of the best healthy energy drinks on the market.

How much caffeine is in Zevia Energy?

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There are 120mg of caffeine in a 12-ounce can of Zevia Energy. At first glance, it seems like it contains the lowest amount of caffeine out of any energy drink on this list – and that’s true in terms of the amount of caffeine in the can – but that’s not the case when you’re looking at its caffeine content by volume. There are 10mg of caffeine per ounce which actually means by volume it has more caffeine than the Monster Energy Zero Ultra.

You can pick up an assorted 12-pack of all the flavors here.

Caffeine In Zero Calorie Energy Shots

Energy shots are in a whole other league of their own in terms of caffeine content, so I’ve ranked them separately from the energy drinks. Like the energy drinks I listed above, I’ve also listed the energy shots below from highest caffeine to lowest caffeine.

With that said, here’s a quick rundown of the most popular energy shot options available.

17. Neu Ultra Strength Energy

This high-powered shot has more caffeine than 3 cups of coffee combined, all in a tiny 2 oz. shot. It’s also made with nootropic ingredients for increased mental clarity and focus to give both your brain and body the kick they need.

How much caffeine is in Neu Tropical?

There are 350mg of caffeine in a Neu Tropical energy shot. That means every ounce has 175mg of caffeine, by far the most caffeine out of anything on this list.

18. Redline Max 300

Redline Max 300 promises 7 hours of energy with added vitamins and beneficial electrolytes. With that long-lasting energy window, it can keep you awake through college classes/homework, or work. Plus, it even is calorie-free.

How much caffeine is in a MAX 300 REDLINE?

There are 300mg of caffeine in every 2.5-ounce bottle of MAX 300 REDLINE. That caffeine count makes it one of the most caffeinated energy shots on the market.

Here is a 12-pack of the sour heads flavor.

19. Phoenix Energy Shot

Phoenix Energy elevates moods, improves focus, and provides lasting energy all at once to have you feeling your best. Each 2 ounce shot contains 12 active ingredients, expertly blended to increase wakefulness while keeping you cool and collected at the same time. Not to mention, it’s totally calorie free as well

How much caffeine is in Phoenix Energy?

There are 280mg of caffeine in every 2-ounce bottle of Phoenix Energy. So, if you’re looking to super charge your day, this energy shot is a great way to do it.

20. Tweaker Energy Shot

As the name suggests, Tweaker energy gives you crazy levels of energy, crazy fast. It’s made with a revolutionary formula of herb based stimulants and caffeine to keep you going all day long.

How much caffeine is in a Tweaker Energy shot?

There are 275mg of caffeine in a 2-ounce bottle of Tweaker Energy. So, if you’re looking to bring your energy level up a few notches this drink is a great way to do it.

You can get 12 0f ’em here.

21. 7-Eleven Energy Shot

You can find these energy shots in practically any 7-eleven, making them a convenient choice whenever you need a high-powered pick-me-up. They’re made with added green tea and yerba mate extracts, plus B vitamins to go along with the caffeine to enhance your cognitive abilities.

How much caffeine is in a 7-11 Energy Extra Strength?

There are 260mg of caffeine in a shot of 7-11’s Extra Strength Energy.

22. E6 Energy Shot

E6 shots are made with both caffeine and green tea extract, for more balanced, long-lasting energy. Like other energy drinks on this list, they’re also made with B vitamins for added natural energy production.

How much caffeine is in a e6 Hour Energy Shot?

There are 235mg of caffeine in every 1.93 fl ounce e6 Energy Shot.

You can pick up a 12-pack of the grape flavor here.

23. Eternal Energy Extra Strength

Eternal Energy lives up to its name, providing long-lasting, smooth, and balanced energy with no jitters or crashing. It’s jam-packed with B12 and B6. On top of all of that, it also has 0 calories.

How much caffeine is in Eternal Energy?

In every 1.93-ounce bottle of Eternal Energy, there is 222mg of caffeine. That means in every ounce there are 115mg of caffeine. If you’re looking for a big boost of energy this is it.

Pick up a 24-pack of the lime flavor here.

24. Bang Shot

Finishing off the energy shots portion of this list is the energy shot from Bang Energy. If you like Bang energy drinks, then you’ll want to try their energy shots too.

Oh, and just so you know, these little shots have almost as much caffeine as a can of their energy drinks but in a 2-ounce shot, you can down in a second.

How much caffeine is in a bang energy shot?

There are 300mg of caffeine in every Bang energy shot.

Grab a 12-pack of the purple haze flavor here.

Wrapping It Up

Well, there you have it, that’s how much caffeine is in some of the most popular energy drinks on the market today. Not to mention, all of these are also low calorie energy drinks too. Each one of them has less than 15 calories, so, not only can you get your caffeine in, but you can do so without adding a ton of empty calories to your day.

Anyway, as with all of my guides/lists, I hope you found this helpful! If you give any of these options a try, be sure to let me know what you think in the comments below.

More Low Calorie Lists

If you’re looking for more low calorie lists, I have a ton on the blog that you can check out next!

Here are some reader favorites:

• Low calorie milk
• Low calorie wines
• Low calorie alcohol drinks
• Low calorie coffee creamer