Monster vs Celsius: which has more caffeine?
Monster has about 160 mg in a 16 oz can; Celsius has about 200 mg in 12 oz. See how they compare per can and per ounce.
Celsius has more caffeine, per can and especially per ounce. A 12 oz Celsius has about 200 mg, while a 16 oz Monster has about 160 mg, even though the Monster can is bigger.
| Drink | Serving | Caffeine | Per ounce |
|---|---|---|---|
| Celsius Original | 12 oz | 200 mg | 16.7 mg/oz |
| Monster | 16 oz | 160 mg | 10 mg/oz |
Why the smaller can wins
Celsius packs about 16.7 mg per ounce against about 10 mg for Monster. One Celsius is already above an average adult's whole day of caffeine (about 165 mg).
Go deeper
Full breakdowns: Celsius caffeine and Monster caffeine. See them side by side on the Caffeine Bubble Map, or add these to your day in the Caffeine Calculator.
Written by Mike Zagare · Published
Mike Zagare is the founder of Knuckle. He tapered off a 500 to 600mg-a-day habit and built Knuckle from that protocol.
Common questions
Is Celsius stronger than Monster?
Yes. About 200 mg in 12 oz versus about 160 mg in 16 oz.
How many Celsius a day is too much?
Two cans reach the FDA's 400 mg daily guidance for healthy adults, before counting any coffee or tea.
Related tools
Related articles
Join the waitlist and get the free quit guide
The Knuckle app opens in Q4 2026. Sign up and we'll send the day-by-day quit guide now, plus one note the day the app is ready.