Monster Ultra Ultra Blue (16oz) — caffeine content and your daily math
The chemical receipt for Monster Ultra Ultra Blue: label caffeine, coffee equivalence, and what's still in you at bedtime.
| Fact | Value |
|---|---|
| Caffeine per can (label) | 140 mg |
| Can size | 16 fl oz |
| Caffeine per fl oz | 8.8 mg |
| ≈ cups of coffee (8oz drip) | 1.5 |
| Share of FDA 400mg/day guidance | 35% |
| Maker | Monster Beverage |
What's still in you, hour by hour
| Time after drinking | Caffeine remaining (≈5h half-life) | |
|---|---|---|
| +2h | 106mg | |
| +4h | 80mg | |
| +6h | 61mg | late afternoon if consumed at lunch |
| +8h | 46mg | bedtime territory for most schedules |
| +10h | 35mg | bedtime territory for most schedules |
Run your own numbers with the caffeine half-life calculator.
Stacking: caffeine + nicotine
If you also use nicotine pouches, the two stimulants stack — both raise heart rate and both suppress appetite, and the combination on an empty stomach is the single most common "wired but fried" pattern SteadyBeast users log. A 140mg can plus a few 6mg pouches before lunch is a bigger nervous-system event than either alone. See the nicotine pouch database for the other half of your math.
Good to know: Ultra-line caffeine is printed as 140–150mg depending on flavor and production run — check your can.
FAQ
How much caffeine is in Monster Ultra Ultra Blue?
Monster Ultra Ultra Blue (16oz) contains 140mg of caffeine per the label — about 1.5 cups of 8oz drip coffee (~95mg each). Always confirm on your can; formulations change.
How long does the caffeine in Monster Ultra Ultra Blue stay in your system?
Caffeine's average half-life is ~5 hours. From a 140mg can, roughly 70mg is still active 5 hours later and ~35mg after 10 hours — which is why an afternoon can shows up at bedtime.
Is 140mg of caffeine a lot?
The FDA cites 400mg/day as a level not generally associated with negative effects for healthy adults. One Monster Ultra Ultra Blue is 35% of that — before any coffee, tea, soda, or pre-workout you also had.