Energy drink
Caffeine in Monster Ultra (Zero Sugar)
150mg
per 16 oz
≈ 2 coffees≈ 2 Red Bulls38% of FDA daily max
Is that a lot?
Monster Ultra (Zero Sugar) is 38% of the FDA’s recommended daily maximum, in a single 16 oz.
Green tea
Espresso
Red Bull
Coffee
Monster Ultra (Zero Sugar)
FDA daily max · 400mg
Before bed
When can I drink Monster Ultra (Zero Sugar) and still sleep?
Your Monster Ultra (Zero Sugar) cutoff
You drink it at
Bedtime
Monster Ultra (Zero Sugar) · 150 mg · assuming an average ~5 h half-life
At bedtime
49 mg
should be fine
Latest safe Monster Ultra (Zero Sugar): 3:05 PM
How much caffeine is in Monster Ultra (Zero Sugar)?
Monster Ultra trims the sugar to zero while keeping the energy high, around 150 mg of caffeine in a 16 oz can. It's the lighter-tasting, sugar-free path to roughly two coffees' worth of caffeine.
| Serving | Caffeine | Sugar |
|---|---|---|
| 16 oz | 150 mg | 0 g |
Will Monster Ultra (Zero Sugar) affect your sleep?
At 150 mg, Ultra needs close to eight hours to fall under 50 mg, so a midday can can still be present at bedtime. The missing sugar doesn't change how long the caffeine sticks around.
Heads up
At 150 mg, a second Monster Ultra (Zero Sugar) 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