Caffeine in Celsius
A 355 ml can of Celsius holds about 200 mg of caffeine, the strongest mainstream energy drink and half a day's limit in one can.
| Caffeine per serving | 199 mg |
| Serving | 12 oz can (355 ml) |
| Caffeine per 100 ml | 56 mg |
| Share of the 400 mg daily limit | 50% |
| Equal to filter coffee | 2.1 mugs |
| Equal to espresso | 3.1 shots |
| Time to fall below 40 mg | 13 and a half hours |
How long does it last?
How late can you have it?
For an average metabolism this drops below the 40 mg sleep threshold about 13 and a half hours after you drink it, so the latest you could have one and still be clear by an 11 pm bedtime is 9:36 am. A fast metaboliser gains roughly two hours, a slow one loses two.
What to know
200 mg in a small can is double a mug of filter coffee arriving in ten minutes. That is the same dose as a caffeine tablet, in a drink sold as a fitness beverage.
Two cans is 400 mg, the entire daily limit, before any coffee. This is the easiest way on the whole site to overshoot without feeling like you did anything unusual.
It is marketed around exercise, so it is often drunk before an evening gym session. A 200 mg can at 7 pm leaves roughly 120 mg at midnight, which is well above anything compatible with normal sleep.
Alani Nu, its closest competitor, is the same 200 mg in the same size can.
Compared with the rest of the energy drinks
| Drink | Serving | Caffeine |
|---|---|---|
| Celsius | 12 oz can (355 ml) | 199 mg |
| Alani Nu | 12 oz can (355 ml) | 199 mg |
| Monster | 16.9 oz can (500 ml) | 160 mg |
| Rockstar | 16 oz can (473 ml) | 151 mg |
| Red Bull | 8.4 oz can (250 ml) | 80 mg |
Common questions
How much caffeine is in Celsius?
Celsius has about 199 mg of caffeine per 12 oz can (355 ml). That is 50% of the 400 mg daily limit for a healthy adult, or about 2.1 mugs of filter coffee.
How long does the caffeine in Celsius last?
It peaks about 45 minutes after you drink it and halves every 5.7 hours. For an average adult one 12 oz can takes about 13 and a half hours to fall below 40 mg, the line Cira uses as low enough to sleep on.
How late can I drink Celsius and still sleep?
For an 11 pm bedtime the latest is about 9:36 am. Move it by the same amount as your own bedtime. People who clear caffeine slowly should stop about two hours earlier.
How many servings of Celsius can I have in a day?
About 2, going by the 400 mg daily limit for healthy adults. That limit covers everything else with caffeine in it too, so the real number is lower on a day with other coffee, tea or cola.
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Where these numbers come from
Caffeine content is the typical value for the serving shown, the same figure the Cira app uses. Brands and brew methods vary, so treat it as a good estimate rather than a measurement of your cup. The 5.7 hour half-life is 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. How the numbers are worked out.
