Caffeine in Monster
A 500 ml can of Monster holds 160 mg of caffeine, roughly 1.7 mugs of filter coffee, and 40 percent of the 400 mg daily limit.
| Caffeine per serving | 160 mg |
| Serving | 16.9 oz can (500 ml) |
| Caffeine per 100 ml | 32 mg |
| Share of the 400 mg daily limit | 40% |
| Equal to filter coffee | 1.7 mugs |
| Equal to espresso | 2.5 shots |
| Time to fall below 40 mg | 11 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 11 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 11:24 am. A fast metaboliser gains roughly two hours, a slow one loses two.
What to know
The 500 ml can is the standard one, and it is where the difference from Red Bull lies. Per 100 ml the two are nearly identical, at about 32 mg. Monster simply sells twice as much of it.
Half a can is a genuine option and a rare one in this category, since the can reseals poorly but does chill. 80 mg is a completely different afternoon from 160 mg.
For an average metabolism a full can needs about eleven hours to fall under the sleep threshold. To be clear by 11 pm you would have to finish it around noon.
Monster Ultra, Juice and the rest of the range all sit at the same 160 mg per 500 ml. The flavour changes, the dose does not.
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 Monster?
Monster has about 160 mg of caffeine per 16.9 oz can (500 ml). That is 40% of the 400 mg daily limit for a healthy adult, or about 1.7 mugs of filter coffee.
How long does the caffeine in Monster last?
It peaks about 45 minutes after you drink it and halves every 5.7 hours. For an average adult one 16.9 oz can takes about 11 and a half hours to fall below 40 mg, the line Cira uses as low enough to sleep on.
How late can I drink Monster and still sleep?
For an 11 pm bedtime the latest is about 11:24 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 Monster 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.
