How much caffeine is in Rockstar Punched?

A 16 fl oz can of Rockstar Punched has 240 mg of caffeine.

That's about 3 cups of brewed coffee, and 60% of the 400 mg a day the FDA cites for most healthy adults.

Source: rockstarenergy.com · checked 10 Nov 2026

Rockstar Watermelon lists the same 240 mg per 16 fl oz can.

When did you have it?

Had at 3 pm, about 84 mg is still in you at an 11 pm bedtime. That might affect your sleep.

Bedtime

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Latest time to drink it

For an 11 pm bedtime, most people should finish a 16 fl oz can of Rockstar Punched by about 11:10 am. 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	Too much for one evening	9:10 am	2:10 pm
10 pm	5:10 am	10:10 am	3:10 pm
11 pm	6:10 am	11:10 am	4:10 pm
Midnight	7:10 am	12:10 pm	5:10 pm
1 am	8:10 am	1:10 pm	6:10 pm

For a 16 fl oz can of Rockstar Punched, 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 16 fl oz can of Rockstar Punched peaks in your blood about 75 minutes after you start it, at roughly 205 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	169 mg	111 mg	73 mg	48 mg

So one had at 3 pm leaves about 84 mg at 11 pm. How long caffeine lasts explains the curve.

How it compares

Rockstar Punched is stronger than 90% of the 41 energy drinks we track, by caffeine per serving.

Per fluid ounce (15 mg) it is stronger than 68% of them.

To reach 400 mg in a day you would need about 1½ of these.

Less caffeine

5-hour Energy Extra Strength 230 mg, 1 shot
3D Energy 200 mg, 16 fl oz can
5-hour Energy 200 mg, 1 shot

More caffeine

Celsius Essentials 270 mg, 16 fl oz can
Bang Energy 300 mg, 16 fl oz can
Bucked Up Energy Drink 300 mg, 16 fl oz can

FAQ

Is Rockstar Punched high in caffeine?

Yes, very. A 16 fl oz can of Rockstar Punched has 240 mg, which is 2.5 times an 8 fl oz cup of brewed coffee (95 mg).

Can I drink Rockstar Punched at night?

Not if you want to sleep well. Had at 7 pm, it leaves about 147 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 11:10 am.

How long does the caffeine in Rockstar Punched last?

It peaks about 75 minutes after you start it. Of the 240 mg, about 111 mg is still in you 6 hours later and 48 mg after 12 hours, for an average adult with a 5-hour half-life.

Does Rockstar Punched have more caffeine than a cup of coffee?

Yes. A 16 fl oz can of Rockstar Punched has 240 mg; an 8 fl oz cup of coffee has 95 mg.

Method and limits

The caffeine figure comes from rockstarenergy.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. If you are pregnant, ask your doctor; common guidance is under 200 mg a day.

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