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How Much Caffeine Is in Monster Ultra?
A 16 oz can of Monster Ultra has 140 to 155 mg of caffeine, depending on the flavor. Most flavors, including Zero Ultra (the white can), Strawberry Dreams and Peachy Keen, have 150 mg. That’s a little less than original Monster, which has 160 mg per 16 oz can.
Monster Ultra is the zero-sugar line, so you get the caffeine without the sugar. Below is the caffeine in every current US flavor, how it compares to coffee and other Monsters, and how many cans fit within the FDA’s daily guideline.
Caffeine in Every Monster Ultra Flavor
Most Ultra flavors sit at 150 mg, Sunrise and Black are the strongest at 155 mg, and Red, Violet and Paradise are the lightest at 140 mg.
| Monster Ultra flavor (16 oz can) | Caffeine | Buy at DrinkWorlds |
|---|---|---|
| Ultra Sunrise | 155 mg | 15-pack, $22.99 |
| Ultra Black | 155 mg | |
| Zero Ultra (white can) | 150 mg | In the Peachy Keen variety pack |
| Ultra Strawberry Dreams | 150 mg | 15-pack, $18.99 |
| Ultra Peachy Keen | 150 mg | Variety pack, $22.89 |
| Ultra Wild Passion | 150 mg | 15-pack, $20.99 |
| Ultra Punk Punch | 150 mg | 15-pack, $20.99 |
| Ultra Blue Hawaiian | 150 mg | Variety pack, $20.99 |
| Ultra Vice Guava | 150 mg | Variety pack, $20.99 |
| Ultra Fantasy Ruby Red | 150 mg | Variety pack, $20.99 |
| Ultra Fiesta Mango | 150 mg | |
| Ultra Rosa | 150 mg | |
| Ultra Watermelon | 150 mg | |
| Ultra Red | 140 mg | 15-pack, $25.99 |
| Ultra Violet | 140 mg | Variety pack, $22.89 |
| Ultra Paradise | 140 mg | Variety pack, $22.89 |
Caffeine per US 16 oz can from Caffeine Informer, which checks each flavor’s label. Flavors and formulas can change, so the can’s label is always the final word. Prices checked at DrinkWorlds in November 2026.
Monster Ultra vs Original Monster and Other Drinks
Monster Ultra has slightly less caffeine than original Monster, and about the same as a 12 oz coffee at the low end of the range.
| Drink | Size | Caffeine |
|---|---|---|
| Monster Ultra (most flavors) | 16 oz | 150 mg |
| Monster Energy Original | 16 oz | 160 mg |
| Monster Lo-Carb | 16 oz | 140 mg |
| Monster Lando Norris Zero Sugar | 16 oz | 145 mg |
| Brewed coffee | 12 oz | 113 to 247 mg |
| Black tea | 12 oz | about 71 mg |
| Caffeinated soda | 12 oz | 23 to 83 mg |
Monster figures from Caffeine Informer, Monster Energy (Lo-Carb) and the H-E-B label (Lando Norris). Coffee, tea and soda figures from the FDA.
So a can of Monster Ultra is not stronger than a big coffee. The difference is that it’s easy to drink two or three cans in a day without noticing. For the full Monster range, including Juice Monster, Rehab and the much stronger Killer Brew, see our guide to how much caffeine is in Monster.
How Many Monster Ultras Can You Drink a Day?
The FDA says 400 mg of caffeine a day is an amount not generally linked to negative effects in healthy adults (FDA). At 150 mg a can, two Monster Ultras is 300 mg. A third can takes you to 450 mg, over that guideline.
That 400 mg counts caffeine from everything: coffee, tea, soda and pre-workout. If you have a coffee in the morning, one can of Ultra in the afternoon is a more sensible ceiling.
Some people should be more careful:
- Pregnant or breastfeeding: the FDA recommends talking to your doctor about how much caffeine is right for you.
- Children and teens: pediatric experts advise against energy drinks for kids and teens.
- Caffeine-sensitive people: if you get jittery, anxious, or can’t sleep, cut back. Those are common signs of too much caffeine.
Is Monster Ultra Healthier Than Regular Monster?
Monster Ultra has zero sugar and very few calories, while a can of original Monster is full-sugar. So for sugar and calories, Ultra is the better choice. The caffeine is about the same (150 mg vs 160 mg), so it’s no gentler on sleep or your heart rate.
Zero Ultra is sweetened with erythritol, sucralose and acesulfame potassium (Open Food Facts). If you prefer to avoid artificial sweeteners, check the label before you buy.
FAQs
How much caffeine is in a 16 oz Monster Ultra?
Most 16 oz Monster Ultra flavors have 150 mg of caffeine. Ultra Sunrise and Ultra Black have 155 mg, and Ultra Red, Violet and Paradise have 140 mg.
Does Monster Ultra have more caffeine than regular Monster?
No. Original Monster has 160 mg per 16 oz can, slightly more than the 150 mg in most Ultra flavors.
Which Monster Ultra has the most caffeine?
Ultra Sunrise and Ultra Black, at 155 mg per 16 oz can.
Which Monster Ultra has the least caffeine?
Ultra Red, Ultra Violet and Ultra Paradise, at 140 mg per can.
Is 150 mg of caffeine a lot?
It’s a moderate dose for a healthy adult, roughly the same as a 12 oz cup of brewed coffee at the low end. It’s about 38% of the FDA’s 400 mg daily guideline.
Does Monster Ultra have sugar?
No. Monster Ultra is sugar-free. Zero Ultra, for example, is sweetened with erythritol, sucralose and acesulfame potassium.
The Bottom Line
Monster Ultra has 150 mg of caffeine in most flavors, with a range of 140 to 155 mg. That’s a little less than original Monster and comfortably inside the FDA’s 400 mg daily guideline if you stick to one or two cans.
Stock up on your favorite flavor, or try three at once with a variety pack. Shop Monster Ultra 15-packs at DrinkWorlds → Free US shipping on orders over $35.
