Celsius vs Red Bull: caffeine compared
Celsius has 199 mg of caffeine per 12 oz can. Red Bull has 80 mg per 8.4 oz can.
Per serving Celsius is ahead: 199 mg against 80 mg, 2.5 times as much. Per 100 ml Celsius is ahead: 56 mg against 32 mg, about 75% more.
| Celsius | Red Bull | |
|---|---|---|
| Serving | 12 oz can (355 ml) | 8.4 oz can (250 ml) |
| Caffeine per serving | 199 mg | 80 mg |
| Caffeine per 100 ml | 56 mg | 32 mg |
| Caffeine per fl oz | 16.6 mg | 9.5 mg |
| In the same 12 oz (355 ml) | 199 mg | 114 mg |
| Share of the 400 mg daily limit | 50% | 20% |
| Peak level, 45 minutes in | 182 mg | 73 mg |
| Time to fall below 40 mg | 13 and a half hours | 6 hours |
| Latest for an 11 pm bedtime | 9:36 am | 5:06 pm |
| Servings to reach 400 mg | 2 | 5 |
What the numbers mean
Celsius is sold as a fitness drink and Red Bull as an energy drink, and the labels suggest the opposite of what is in the can. Celsius carries two and a half times the caffeine of a standard Red Bull.
Per sip Celsius is stronger too, at 56 mg per 100 ml against 32. One can of Celsius is half the daily limit and needs to be finished in the morning. One can of Red Bull is closer to a mug of instant coffee.
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Common questions
Which has more caffeine, Celsius or Red Bull?
Celsius. One 12 oz can holds 199 mg, against 80 mg in one 8.4 oz can of Red Bull: 2.5 times as much.
Which is the better choice late in the day?
Red Bull. For an 11 pm bedtime one serving can be had as late as 5:06 pm, against 9:36 am for Celsius.
How many servings of Red Bull equal one Celsius?
About 2.5. One 12 oz can of Celsius holds 199 mg and one 8.4 oz can of Red Bull holds 80 mg.
How many can I have in a day?
Going by the 400 mg daily limit for healthy adults: about 2 servings of Celsius or 5 of Red Bull, if that is the only caffeine you have. Anything else with caffeine in it counts toward the same limit.
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Where these numbers come from
Every figure is calculated with the model the Cira app uses: caffeine peaks 45 minutes after you take it and halves every 5.7 hours, a typical value for healthy adults. The 40 mg sleep line is a working threshold of the model, and the 400 mg daily limit is the figure used by the European Food Safety Authority and the US FDA. These are averages. Smoking, pregnancy, the contraceptive pill and some medicines change how fast you clear caffeine. How the numbers are worked out.
