Red Bull vs Monster: Caffeine, Sugar and Price per Can

Red Bull vs Monster: Caffeine, Sugar and Price per Can

Ounce for ounce, Red Bull and Monster are nearly the same drink: about 9.5 mg vs 10 mg of caffeine and 3.2 g vs 3.4 g of sugar per fluid ounce. The difference is the can. A standard 8.4 oz Red Bull delivers 80 mg of caffeine and 27 g of sugar. A standard 16 oz Monster delivers 160 mg and 54 g. Double the volume, double the dose. Everything else follows from that one fact.

Key Takeaways

• Per ounce, near-identical. Red Bull has 9.5 mg caffeine/oz; Monster has 10 mg. The "stronger" drink is just the bigger can.
• Sugar is a can-size problem. One 16 oz Monster hits 150% of the AHA daily added-sugar limit for men (36 g). An 8.4 oz Red Bull hits 72%.
• Monster wins on price per milligram. At typical Amazon pricing, Monster delivers about 89 mg of caffeine per dollar vs Red Bull's 50 mg.
• Both brands have zero-sugar lines sweetened with different blends of sucralose, acesulfame K, erythritol, and (in Red Bull Zero) monk fruit.

Red Bull vs Monster: Side-by-Side Comparison

All caffeine, sugar, and calorie figures below come from Red Bull's US product pages and Monster's US product pages. Prices are Amazon listings checked October 7, 2026; they move daily.

Which Has More Caffeine, Red Bull or Monster?

Per can, Monster wins easily: 160 mg vs 80 mg in the default sizes. Per ounce, they are a wash.

Red Bull publishes caffeine for every can size: 80 mg (8.4 oz), 114 mg (12 oz), 151 mg (16 oz), and 198 mg (20 oz). Monster publishes caffeine only for its 16 oz format. Here is the size ladder:

Monster also sells 12, 19.2, and 24 oz cans, but publishes caffeine based on 16 fl oz only. Numbers you see for other sizes on third-party sites are estimates. For the full breakdown, see how much caffeine is in every Monster line.

The FDA cites 400 mg per day as the amount "not generally associated with dangerous, negative effects" for most healthy adults. That is five small Red Bulls or two and a half standard Monsters. More on safe daily limits: how many energy drinks a day is too many.

Red Bull vs Monster Sugar: Is One Worse?

A 16 oz Monster has 54 g of added sugar, which the label itself marks as 108% of the Daily Value. A 16 oz Red Bull has 51 g. At the default can sizes (8.4 oz vs 16 oz), the gap looks wider: 27 g vs 54 g.

The American Heart Association recommends no more than 36 g of added sugar per day for men and 25 g for women. Mapped against those limits:

• Monster Original 16 oz (54 g): 150% of the men's limit, 216% of the women's.
• Red Bull 8.4 oz (27 g): 75% of the men's limit, 108% of the women's.
• Red Bull 16 oz (51 g): 142% of the men's limit, 204% of the women's.

"Which is worse" depends on how much you drink, not on the logo. At 16 oz, you get roughly the same sugar from either can. The 8.4 oz Red Bull looks better because the serving is smaller. For a closer look: is Red Bull bad for you, ingredient by ingredient and is Monster bad for you.

What Is Actually in Each Can

Red Bull keeps a short ingredient list. Its US product page names five categories: caffeine, taurine, B-group vitamins, sugars, and water. The full retailer ingredient line: carbonated water, sucrose, glucose, citric acid, taurine, sodium bicarbonate, magnesium carbonate, caffeine, niacinamide, calcium pantothenate, pyridoxine HCl, vitamin B12, natural and artificial flavors, colors. No guarana, no ginseng, no carnitine.

Monster's list is longer. A manufacturer label sheet for the 16 oz Original adds panax ginseng extract, L-carnitine L-tartrate, guarana extract, D-glucuronolactone, inositol, and maltodextrin on top of the standard caffeine, taurine, and B vitamins. One surprise: sucralose appears in the full-sugar Monster too.

Neither brand prints a milligram figure for taurine. Red Bull says the human body (154 lb) holds 70 times more taurine than one 8.4 oz can. For what the ingredient actually does, see what taurine actually does.

B vitamins compared (% Daily Value per can):

Sodium: 105 mg in an 8.4 oz Red Bull vs 370 mg in a 16 oz Monster. That is 3.5 times as much in absolute terms.

Red Bull Sugarfree vs Monster Zero Ultra (and Zero Sugar)

Both brands sell zero-sugar versions with different sweetener blends. Here is how they compare:

Sources: Red Bull Sugarfree, Red Bull Zero, Monster Zero Ultra (Food Lion), Monster Zero Sugar (Food Lion).

Red Bull Zero is the only one using monk fruit. Monster Zero Ultra ("the white Monster") has 10 mg less caffeine than Monster Zero Sugar: 150 mg vs 160 mg. All four contain sucralose. More on sweetener differences: sucralose vs stevia.

Red Bull vs Monster Price per Can (and per 100 mg)

Prices below are from Amazon on October 7, 2026. Amazon was running Prime Big Deal Days, so some items showed sale prices alongside a "typical" or list price. Prices move daily.

Monster delivers almost twice the caffeine per dollar. Per-can prices are close ($1.59 vs $1.80), but Monster's can holds double the liquid and caffeine.

If You Want Neither Can

Maybe the real issue is 26 to 54 grams of sugar in one sitting, or 160 mg of caffeine you cannot split in half. Here is how a few options compare:

For more options below the 100 mg threshold, see low-caffeine energy drinks at 100 mg or less.

Red Bull or Monster: Which Should You Pick?

Match the dose to the can, not the brand to the logo. At 16 oz, Red Bull and Monster are separated by 9 mg of caffeine and 3 g of sugar. That is not a meaningful health distinction.

Pick the 8.4 oz Red Bull if you want a smaller default dose (80 mg) without buying a bigger can and trying to drink half. Pick a zero-sugar line from either brand if sugar is the concern. Pick Monster if value matters.

Neither drink is "healthy" in a clinical sense. Both are delivery systems for caffeine and sugar (or caffeine and sweeteners). The question that matters is how many milligrams and how many grams you want in one sitting. That is a question about can size.

Frequently Asked Questions

Which is worse for you, Red Bull or Monster?

At the same volume (16 oz), the two are almost identical: 151 vs 160 mg caffeine, 51 vs 54 g sugar. Monster looks "worse" because its default can is twice as big. The real variable is how much you drink per day, not which logo is on the can.

Is Monster stronger than Red Bull?

Per can, yes: 160 mg vs 80 mg in the default sizes. Per fluid ounce, no. Monster is 10 mg/oz; Red Bull is 9.5 mg/oz. Red Bull's 16 oz and 20 oz cans (151 mg and 198 mg) close or reverse the gap.

Does Red Bull or Monster have more sugar?

Monster Original has 54 g in 16 oz. Red Bull has 27 g in 8.4 oz and 51 g in 16 oz. Per ounce, the concentration is nearly identical: 3.2 g/oz vs 3.4 g/oz. Both exceed the AHA daily limit for women (25 g) in a single default can.

Is Monster Zero Ultra healthier than Red Bull Sugarfree?

Both have zero sugar and 10 calories at their respective sizes. Monster Zero Ultra delivers 150 mg caffeine in 16 oz; Red Bull Sugarfree delivers 80 mg in 8.4 oz. They share sucralose and acesulfame K; Monster adds erythritol. "Healthier" depends on whether you want the lower dose or the bigger volume.

How many Red Bulls or Monsters a day is too many?

The FDA's general guidance is that 400 mg of caffeine per day is not generally associated with negative effects for healthy adults. That is five 8.4 oz Red Bulls (5 x 80 = 400 mg) or two and a half Monsters (2.5 x 160 = 400 mg). Sugar lowers the practical limit: two Monsters is 108 g of added sugar, triple the AHA limit for men.

Who should not drink Red Bull or Monster?

Monster's label states: "CONSUME RESPONSIBLY: NOT RECOMMENDED FOR CHILDREN, PEOPLE SENSITIVE TO CAFFEINE, PREGNANT WOMEN OR WOMEN WHO ARE NURSING." Red Bull's US site adds that "pregnant and nursing women should limit their caffeine intake to 200 mg per day." If you have a medical condition or take medication that interacts with caffeine, talk to your clinician.

The Can Size Is the Dose. Here Is a Smaller One

The whole article comes down to a simple observation: Red Bull and Monster are roughly the same liquid per ounce. The can size picks the dose for you, either 80 mg or 160 mg, and you drink it in five minutes.

Roon starts at the same 80 mg of caffeine as a small Red Bull but pairs it with 60 mg L-theanine, 25 mg methylliberine (Dynamine), and 5 mg theacrine (TeaCrine) in a sublingual pouch. No liquid, no sugar (it does contain sucralose), no nicotine. Onset is 5 to 10 minutes. The felt window is 6 to 8 hours, not coffee's 3 to 4. That extension comes from methylliberine: in a randomized, double-blind crossover PK study (n=12, Mondal et al. 2022), co-administration of methylliberine with caffeine cut caffeine's oral clearance from 41.9 to 17.1 L/hr and extended its half-life from 7.2 to 15 hours, with no increase in peak concentration. That study used 100 mg methylliberine with 150 mg caffeine, roughly 4x the methylliberine and 1.9x the caffeine in a Roon pouch, so the direction applies, not the exact numbers. The trade-off: a longer tail means you should stop at least 8 hours before bed.

Pricing starts at $9.16 per tin ($0.61 per pouch) on a 12-tin subscription, or $15.00 per tin one-time (4-tin minimum). If the comparison table above left you wanting a third option between "small Red Bull" and "big Monster," try Roon.

Related from Roon

• How Much Caffeine Is in Red Bull? Every Can Size, Sugar-Free Included
• How Much Caffeine Is in Monster? Every Line and Size
• Is Monster Bad for You?
• Taurine Benefits: Energy, Heart, Brain

Written by Roon Team