The Energy Drinks With the Most Caffeine per Can

What energy drink has the most caffeine? The label of every can answers that, but only for the can in your hand. Here is the highest caffeine energy drink ranking in one place: mg per can, mg per fl oz, the can size, and how many CanMog players own each can.

Why caffeine per can matters on a collector's shelf

Caffeine per can is the number most people check first on an energy drink, so it is a good way to sort your Energy shelf. The range is wide. Wikipedia's energy drink article gives 50 mg to 505 mg per serving across the category.

For a collector, every can on that range is a separate find. A 300 mg can and an 80 mg can of two brands are two cans on your Energy shelf, and so are two flavors of the same brand.

Two numbers: per can and per fl oz

Caffeine per can tells you what is in the whole container. Caffeine per fl oz tells you how concentrated the drink is, and it lets you compare a 12 fl oz can with a 16 fl oz can.

The two orders differ. A 16 fl oz can with 300 mg has 18.75 mg per fl oz. A 12 fl oz can with 280 mg has 23.3 mg per fl oz, so the smaller can ranks higher per ounce.

How to check the caffeine of a can, step by step

You can check any energy drink in under a minute. These steps work for the cans in this post and for imports the lists do not cover.

1. Find the caffeine line on the label. Many US energy drink cans print the caffeine per can or per serving near the nutrition facts.
2. Read the can size. The size sits on the front of the can in fl oz and ml. Write both numbers down.
3. Check the serving count. Some labels split a 16 fl oz can into two servings. Multiply the mg per serving by the serving count to get the mg per can.
4. Divide by the fl oz. Caffeine per can divided by the can size gives mg per fl oz, the number for fair comparisons.
5. Compare with a second source. The brand page or a database like Caffeine Informer confirms the number. Formulas change, so the newest label wins.
6. Scan the barcode. In CanMog, the scan adds the can to your shelf and shows its rarity tier.

The part people get wrong: servings

Servings cause most wrong numbers. A label that says 80 mg per serving on a two-serving can means 160 mg in the can.

The same thing happens with sizes. Red Bull keeps about 9.5 mg per fl oz in every size, so its 12 fl oz can has 114 mg while the 8.4 fl oz can has 80 mg, per Caffeine Informer's Red Bull page.

Which energy drink has the most caffeine: the ranking

The cans with the most caffeine per can sit at 300 mg and above. Caffeine Informer's energy drink list puts Hyde Xtreme first at 400 mg in 12 fl oz, then BreinFuel at 360 mg in 12 fl oz and Spike Hardcore Energy at 350 mg in 16 fl oz.

I found no CanMog key that clearly matches those three, and I could not confirm that all of them come in cans. The table below ranks the cans that players have on their shelves, with the most-owned can of each line. I pulled these owner counts from the CanMog database on October 24, 2026.

Sources for the numbers: Bang, C4 Ultimate, G Fuel (it sells 140 mg and 300 mg cans), Raze, Cocaine Energy, Ghost, Alani Nu, Celsius, Bloom and Monster. Wired X344, Reign and Bucked Up come from the Caffeine Informer list above.

The ranking per fl oz

Per fl oz, the order changes. The 12 fl oz cans climb and Ghost drops, because it spreads 200 mg over 16 fl oz.

The barcode counts are for the whole brand, all lines and sizes. A 0 means the bundled catalog does not know the barcode yet. The app then looks the can up in Open Food Facts when you scan it.

What energy drink has the least caffeine

The lowest caffeine energy drink cans in this post are the classic small cans and the soda-brand lines. Mtn Dew Kickstart has 90 mg in a 16 fl oz can, about 5.6 mg per fl oz, per Caffeine Informer's Kickstart page. Its 12 fl oz Blood Orange and Watermelon cans have 68 mg.

Red Bull's 8.4 fl oz can has 80 mg, the smallest total of the big brands in the ranking. Bloom has a 7.5 fl oz can with 100 mg, per the Bloom Sparkling Energy page.

Caffeine-free energy cans

Some brands make cans with no caffeine at all. Wikipedia's Bang Energy article says Bang announced a caffeine-free variant. A caffeine-free can is still an energy drink can, so it goes on the same Energy shelf as the 300 mg cans.

The most-owned Mtn Dew Kickstart key had 25 owners as of October 24, 2026, Common. Low caffeine does not make a can rarer: rarity counts players, not milligrams.

How to track your high-caffeine shelf

Your progress on a caffeine checklist is the number of different cans you own from it. Duplicates do not count, so ten cans of one flavor stay one can on your shelf.

• Lines covered: How many of the 14 lines in the first table do you own?
• Flavors per line: Bang, Reign and Ghost each have many flavors. Each flavor is its own can and its own key.
• Badges: The badge rules count different cans and different brands, never duplicates.
• Tier: Check the tier on each card. Fewer owners means a rarer tier, and 17 or more owners is Common. The tier table has the other thresholds.

The catalog's highest-mg cans

The CanMog catalog holds 2,668 barcodes. Its highest-mg energy drink cans that I could check against a source are the 300 mg cans: 11 Bang barcodes, 16 Reign barcodes, 6 G Fuel barcodes and 1 C4 Ultimate barcode.

Some catalog entries show 320 mg or more. Those are 1-liter bottles, multipacks or pre-workout powders, or a wrong number, so I left them out. One example: a Monster Mule entry shows 338 mg, while Caffeine Informer lists Monster at 160 mg per 16 fl oz can.

Common mistakes and edge cases

Caffeine numbers on the web mix cans, bottles and serving sizes. These are the traps to check before you count a can on your list.

• Mistake: comparing a can with a serving. A 160 mg can with two servings reads as 80 mg per serving. Compare whole cans, or compare mg per fl oz.
• Mistake: one number for a whole brand. G Fuel sells cans at 140 mg and at 300 mg, and Bloom has 180 mg and 100 mg cans. Read the can you hold.
• Mistake: an old label. Formulas change. When the label and a website disagree, the newest label wins.
• Mistake: expecting a rare tier from high caffeine. The tier comes from the number of owners. Big brands also have a shop floor: a Monster or Red Bull flavor is at most Uncommon, as the rarity rules explain.

Bottles, shots and pre-workout drinks

The top of most caffeine lists holds drinks that do not come in cans. Caffeine Informer lists Redline Xtreme at 316 mg in 8 fl oz, and energy shots carry their caffeine in about 2 fl oz.

CanMog counts cans only, and the app asks "Is it a can?" when you scan. Check the container before you add a drink to a can checklist.

Your caffeine can checklist and next steps

• The 300 mg cans: Bang, Reign Total Body Fuel, C4 Ultimate, G Fuel, Raze and Bucked Up, all 16 fl oz.
• The top can: Wired X344, 344 mg in 16 fl oz, 1 owner as of October 24, 2026.
• The per-ounce leader: Cocaine Energy, 280 mg in 12 fl oz, 4 owners.
• The 200 mg group: Ghost (16 fl oz), Alani Nu and Celsius (12 fl oz).
• The classics: Monster at 160 mg and Red Bull at 80 mg, the two biggest brands in the catalog.
• The low end: Mtn Dew Kickstart at 90 mg in 16 fl oz.

The rarest cans on this list are the ones few players have found. Wired X344, Raze and Cocaine Energy had 4 owners or fewer on October 24, 2026, and the catalog knows none of their barcodes. The FAQ covers scanning and shelves, and you can get CanMog to start the hunt.