Red Bull vs Monster: caffeine compared
Red Bull has 80 mg of caffeine per 8.4 oz can. Monster has 160 mg per 16.9 oz can.
Per serving Monster is ahead: 160 mg against 80 mg, twice as much. Per 100 ml they are level: 32 mg against 32 mg.
| Red Bull | Monster | |
|---|---|---|
| Serving | 8.4 oz can (250 ml) | 16.9 oz can (500 ml) |
| Caffeine per serving | 80 mg | 160 mg |
| Caffeine per 100 ml | 32 mg | 32 mg |
| Caffeine per fl oz | 9.5 mg | 9.5 mg |
| In the same 12 oz (355 ml) | 114 mg | 114 mg |
| Share of the 400 mg daily limit | 20% | 40% |
| Peak level, 45 minutes in | 73 mg | 146 mg |
| Time to fall below 40 mg | 6 hours | 11 and a half hours |
| Latest for an 11 pm bedtime | 5:06 pm | 11:24 am |
| Servings to reach 400 mg | 5 | 2.5 |
What the numbers mean
Red Bull and Monster have the same strength. Both carry 32 mg of caffeine per 100 ml, a little less than filter coffee. The difference is the can: Monster's standard can is twice the size, so it delivers twice the dose.
That makes the choice one of volume. A small Red Bull at 2 pm is gone by bedtime for most people. A Monster at the same hour is not, and sipping it slowly does not help much: the dose is the same once the can is empty.
The full page for each
Common questions
Which has more caffeine, Red Bull or Monster?
Monster. One 16.9 oz can holds 160 mg, against 80 mg in one 8.4 oz can of Red Bull: twice 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 11:24 am for Monster.
How many servings of Red Bull equal one Monster?
About 2. One 16.9 oz can of Monster holds 160 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 5 servings of Red Bull or 2 of Monster, 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.
