Energy drink
Caffeine in Rockstar Energy
160mg
per 16 oz
≈ 2 coffees≈ 2 Red Bulls40% of FDA daily max
Is that a lot?
Rockstar Energy is 40% of the FDA’s recommended daily maximum, in a single 16 oz.
Green tea
Espresso
Red Bull
Coffee
Rockstar Energy
FDA daily max · 400mg
Before bed
When can I drink Rockstar Energy and still sleep?
Your Rockstar Energy cutoff
You drink it at
Bedtime
Rockstar Energy · 160 mg · assuming an average ~5 h half-life
At bedtime
53 mg
may delay sleep
Latest safe Rockstar Energy: 2:37 PM
How much caffeine is in Rockstar Energy?
A 16 oz Rockstar Energy carries about 160 mg of caffeine, the equivalent of roughly two coffees, riding on a very sweet 63 grams of sugar. It's a classic high-sugar energy can with a solid caffeine hit.
| Serving | Caffeine | Sugar |
|---|---|---|
| 16 oz | 160 mg | 63 g |
Will Rockstar Energy affect your sleep?
At 160 mg, Rockstar needs around eight hours to fall under 50 mg, so an afternoon can can still be active at bedtime. The big sugar load can add its own restlessness to the late-day caffeine.
Heads up
At 160 mg, a second Rockstar Energy in a day pushes you toward the FDA’s 400 mg ceiling — and that’s before any coffee or tea. Log everything in the calculator to see your real daily total.
Source: Manufacturer label