How much caffeine is in Java Monster Mean Bean?
A 15 fl oz can of Java Monster Mean Bean has 188 to 200 mg of caffeine.
That's about 2 cups of brewed coffee, and half of the 400 mg a day the FDA cites for most healthy adults.
Source: monsterenergy.com · checked 10 Nov 2026
When did you have it?
Had at 3 pm, about 68 mg is still in you at an 11 pm bedtime. That might affect your sleep.
Ranges: the chart uses the middle of the published range (194 mg for this size).
Your whole day, every drink, in the free CaffeineIQ check. The iPhone app is coming soon.
Latest time to drink it
For an 11 pm bedtime, most people should finish a 15 fl oz can of Java Monster Mean Bean by about 12:45 pm. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.
| Bedtime | Very sensitive under 25 mg | Average under 50 mg | Not very sensitive under 100 mg |
|---|---|---|---|
| 9 pm | 5:45 am | 10:45 am | 3:45 pm |
| 10 pm | 6:45 am | 11:45 am | 4:45 pm |
| 11 pm | 7:45 am | 12:45 pm | 5:45 pm |
| Midnight | 8:45 am | 1:45 pm | 6:45 pm |
| 1 am | 9:45 am | 2:45 pm | 7:45 pm |
For a 15 fl oz can of Java Monster Mean Bean, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.
How long it lasts
The caffeine from a 15 fl oz can of Java Monster Mean Bean peaks in your blood about 75 minutes after you start it, at roughly 166 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.
| Time after | 3 hours | 6 hours | 9 hours | 12 hours |
|---|---|---|---|---|
| Still in you | 136 mg | 90 mg | 59 mg | 39 mg |
So one had at 3 pm leaves about 68 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Java Monster Mean Bean is stronger than 50% of the 41 energy drinks we track, by caffeine per serving.
Per fluid ounce (13 mg) it is stronger than 62% of them.
To reach 400 mg in a day you would need about 2 of these.
Less caffeine
- Bloom Sparkling Energy 180 mg, 12 fl oz can
- Full Throttle 161 mg, 16 fl oz can
- Rockstar Energy 161 mg, 16 fl oz can
More caffeine
- 3D Energy 200 mg, 16 fl oz can
- 5-hour Energy 200 mg, 1 shot
- Alani Nu Energy Drink 200 mg, 12 fl oz can
FAQ
Is Java Monster Mean Bean high in caffeine?
Yes. A 15 fl oz can of Java Monster Mean Bean has 188 to 200 mg, which is 2 times an 8 fl oz cup of brewed coffee (95 mg).
Can I drink Java Monster Mean Bean at night?
Not if you want to sleep well. Had at 7 pm, it leaves about 119 mg in an average adult at an 11 pm bedtime, above the 50 mg most people sleep fine with. The latest time for an 11 pm bedtime is about 12:45 pm.
How long does the caffeine in Java Monster Mean Bean last?
It peaks about 75 minutes after you start it. Of the 188 to 200 mg, about 90 mg is still in you 6 hours later and 39 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Java Monster Mean Bean have more caffeine than a cup of coffee?
Yes. A 15 fl oz can of Java Monster Mean Bean has 188 to 200 mg; an 8 fl oz cup of coffee has 95 mg.
Method and limits
The caffeine figure comes from monsterenergy.com; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.
These are estimates for information, not medical advice.
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