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

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

Celsius vs Red Bull comes down to three numbers: caffeine, sugar and shelf price. A 12 oz Celsius has 200 mg of caffeine, 10 calories and 0 g of sugar. A 12 oz Red Bull has 114 mg of caffeine, 160 calories and 38 g of sugar. The classic 8.4 oz Red Bull has 80 mg and 27 g. Celsius is the stronger can at every comparable size. Red Bull Sugarfree closes the sugar gap but not the caffeine gap.

Below: caffeine per ounce, sugar against AHA limits, what each label actually lists as a caffeine source, and shelf prices with caffeine per dollar.

Key Takeaways

• Celsius has about 75% more caffeine per ounce than a standard Red Bull (16.7 mg/fl oz vs 9.5 mg/fl oz). Against Red Bull's densest can, the 20 oz at 9.9 mg/fl oz, Celsius still has about 70% more per ounce.
• Sugar is the real gap. A 12 oz Red Bull Original has 38 g of added sugar, more than the AHA daily limit for both women (25 g) and men (36 g). Celsius and Red Bull Sugarfree both have 0 g.
• Celsius costs less and delivers more caffeine per dollar. At one Target store (October 2026), a single 12 oz Celsius was $2.59 vs a 12 oz Red Bull at $3.29.
• Caffeine is the same molecule in both cans. Celsius lists guarana seed extract, caffeine and green tea extract. Red Bull lists caffeine. Neither source is pharmacologically "smoother."

The Label Table: Every Can Side by Side

Sources: Celsius product page, Red Bull ingredients, Red Bull caffeine FAQ, Hannaford retailer labels (12 oz, 20 oz, Sugarfree). The 20 oz caffeine figure is Red Bull's own; some retailer can labels read 189 mg.

Does Celsius Have More Caffeine Than Red Bull?

Yes, at every matching size. Celsius runs about 16.7 mg per fluid ounce. Red Bull runs about 9.4 to 9.9 mg per fluid ounce, depending on the can.

A 12 oz Celsius carries 86 mg more caffeine than a 12 oz Red Bull. Even the 20 oz Red Bull (198 mg) falls just short of a 12 oz Celsius (200 mg). Celsius Essentials (270 mg per 16 oz) is the strongest can of either brand and carries a one-per-day warning.

The FDA has cited 400 mg per day as the amount not generally associated with negative effects in healthy adults. Two 12 oz Celsius cans reach that figure. Five 8.4 oz Red Bulls do the same.

Celsius vs Red Bull: Sugar and Calories

Sugar is where the two brands diverge most. A 12 oz Red Bull Original contains 38 g of added sugar, exceeding the AHA's recommended daily limit for both women (25 g) and men (36 g) in a single can. The 20 oz has 63 g.

Celsius has 0 g of sugar and 10 calories per 12 oz can, sweetened with sucralose.

Red Bull Sugarfree closes the gap: 0 g of sugar, 20 calories per 12 oz, sweetened with aspartame and acesulfame K. Its label carries a phenylketonurics warning because it contains phenylalanine.

Is Celsius "Natural Caffeine"? What the Labels Actually Say

Some comparison pages call Celsius "natural caffeine" and Red Bull "synthetic caffeine," then claim the natural version crashes less. The labels do not support that.

Celsius lists three caffeine-related ingredients: guarana seed extract, caffeine and green tea extract. "Caffeine" appears on its own, separate from the plant extracts. The label declares 200 mg total and does not split that number by source.

Red Bull lists one source: caffeine. Red Bull's ingredients page also highlights taurine (a 154 lb person already holds about 70 times what one 8.4 oz can contains, per Red Bull) and B vitamins.

Caffeine is the same molecule regardless of origin. 1,3,7-trimethylxanthine from guarana behaves identically to the synthesized version. How a can feels depends on dose, drinking speed, sugar content and individual metabolism.

Does Celsius Burn Fat?

The Celsius can states: "CELSIUS alone does not produce weight loss in the absence of a healthy diet and moderate exercise." The Celsius website attributes metabolism claims to green tea extract with EGCG. That is Celsius's marketing position, not a finding this page endorses. For a closer look at the research, see does Celsius actually burn fat.

Red Bull makes no comparable claim.

Celsius vs Red Bull Price per Can

Prices below are from one Target store listing (Cambridge, MA) checked October 7, 2026. They change by store and day.

Celsius wins on caffeine per dollar by a wide margin. Online multipacks widen the gap: the Amazon listing Celsius's own site links to showed a 12-pack at a typical price of $23.64 ($1.97 per can) on October 7, 2026.

Red Bull's advantage is the 8.4 oz format, the only option here with 80 mg in a single can. You pay more per milligram, but you get a smaller dose. For a wider comparison, see Red Bull vs Monster.

Which Is Better for You: Celsius or Red Bull?

There is no single answer. It depends on what you are optimizing for.

If sugar is the problem, Celsius or Red Bull Sugarfree both solve it. If caffeine sensitivity is the concern, the 8.4 oz Red Bull (80 mg) is the gentler can; Celsius delivers 2.5 times that dose. If you have PKU or avoid aspartame, Red Bull Sugarfree is out. If you want the cheapest caffeine per dollar, Celsius wins. For full breakdowns, see caffeine in every Celsius line, Red Bull caffeine by can size and is Red Bull bad for you. For the math on stacking cans, see how many energy drinks a day is too many.

Neither drink is a health food. Both are caffeine-delivery tools with trade-offs on dose, sugar, sweetener type and price.

If a Whole Can Is More Than You Want

Both brands assume you want a full beverage. If you want a specific dose without finishing a drink, the options change. For another Celsius head-to-head, see Alani vs Celsius label by label.

Roon is a zero-nicotine oral pouch, not a drink. It matches Red Bull's 80 mg dose and adds 60 mg L-theanine, with zero sugar and no liquid. It solves a narrow problem neither canned option addresses: precise dose, no can, no sugar.

Frequently Asked Questions

Is Celsius stronger than Red Bull?

Yes. A 12 oz Celsius has 200 mg of caffeine (16.7 mg per fluid ounce). A 12 oz Red Bull has 114 mg (9.5 mg per fluid ounce). Even the 20 oz Red Bull, at 198 mg, has slightly less caffeine than a standard Celsius.

Is Celsius healthier than Red Bull?

It depends on the metric. Celsius has zero sugar and 10 calories. Red Bull Original 12 oz has 38 g of sugar and 160 calories. Red Bull Sugarfree narrows the gap to zero sugar and 20 calories. Neither is a health food.

Can you drink Celsius and Red Bull on the same day?

One 12 oz Celsius (200 mg) plus one 12 oz Red Bull (114 mg) equals 314 mg, under the FDA's 400 mg reference for most healthy adults. Add any other caffeine source and recalculate before opening a second can.

Why does Red Bull feel stronger if it has less caffeine?

A smaller can is usually consumed faster, compressing absorption into a tighter window. The 27 g of sugar in an 8.4 oz Red Bull delivers a rapid glucose spike. Perceived intensity is not always proportional to milligrams.

Is Red Bull Sugarfree the same caffeine as regular Red Bull?

Yes. The 12 oz Sugarfree has 114 mg, identical to the 12 oz Original. The 8.4 oz Sugarfree has 80 mg, same as the 8.4 oz Original. Only the sweetener changes: aspartame and acesulfame K replace sugar.

Who should not drink Celsius or Red Bull?

The Celsius label states: "Not recommended for people who are caffeine sensitive, children under 18, or women pregnant or nursing." The Red Bull label states: "Not recommended for children, pregnant or nursing women and persons sensitive to caffeine." If you fall into any of those categories, the manufacturers say skip it.

80 Milligrams, No Can, Longer Tail

The comparison above keeps circling one tension: Celsius wins on caffeine and cost, but Red Bull's small can wins on dose control. If you want 80 mg without 27 g of sugar, you are left with the 8.4 oz Sugarfree, and like a cup of coffee, a single 80 mg dose fades within a few hours.

Roon is built around that gap. Each pouch delivers 80 mg of caffeine with 60 mg of L-theanine, 25 mg of methylliberine (Dynamine) and 5 mg of theacrine (TeaCrine). Zero sugar, sweetened with sucralose like Celsius. Zero nicotine. Onset in 5 to 10 minutes.

The duration is the difference. In a randomized, double-blind crossover PK study (n=12), methylliberine co-administered with caffeine cut oral clearance from 41.9 to 17.1 L/hr and extended half-life from 7.2 to 15 hours, with no increase in peak concentration. That study used 100 mg methylliberine and 150 mg caffeine, roughly 4x and 1.9x what Roon contains, so the exact magnitudes are the study's, not Roon's. The direction applies: same peak, longer tail. That is why 80 mg in a pouch can sustain a 6 to 8 hour felt window instead of coffee's typical 3 to 4. The trade-off: stop at least 8 hours before bed.

Roon will not replace a cold drink. It is for the person who wants a controlled dose, no sugar, no can and a longer duration. Tins start at $9.16 on a 12-tin subscription ($0.61 per pouch), or $15.00 one-time. Try it if the dose-versus-duration problem is the one you are actually solving.

Related from Roon

• How Much Caffeine Is in Celsius?
• How Much Caffeine Is in Red Bull?
• Does Celsius Actually Burn Fat?
• Red Bull vs Monster

Written by Roon Team