Energy drink
Caffeine in Rockstar Sugar Free
160mg
per 16 oz
≈ 2 coffees≈ 2 Red Bulls40% of FDA daily max
Is that a lot?
Rockstar Sugar Free is 40% of the FDA’s recommended daily maximum, in a single 16 oz.
Green tea
Espresso
Red Bull
Coffee
Rockstar Sugar Free
FDA daily max · 400mg
Before bed
When can I drink Rockstar Sugar Free and still sleep?
Your Rockstar Sugar Free cutoff
You drink it at
Bedtime
Rockstar Sugar Free · 160 mg · assuming an average ~5 h half-life
At bedtime
53 mg
may delay sleep
Latest safe Rockstar Sugar Free: 2:37 PM
How much caffeine is in Rockstar Sugar Free?
Rockstar Sugar Free keeps the 160 mg of caffeine found in regular Rockstar but drops the sugar entirely. It's the leaner path to two coffees' worth of energy in a 16 oz can.
| Serving | Caffeine | Sugar |
|---|---|---|
| 16 oz | 160 mg | 0 g |
Will Rockstar Sugar Free affect your sleep?
At 160 mg, Rockstar Sugar Free needs around eight hours to fall under 50 mg, so an afternoon can can still be active at bedtime. Cutting the sugar doesn't shorten how long the caffeine lingers.
Heads up
At 160 mg, a second Rockstar Sugar Free 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: Rockstar official