How much caffeine is in Red Bull and Monster?
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A 250 ml can of Red Bull contains 80 mg of caffeine, and a 500 ml can of Monster Energy contains 160 mg. Both work out at 32 mg per 100 ml, so the difference is the can size. The sugar-free versions contain the same caffeine.
In short
• Red Bull: 80 mg per 250 ml, 114 mg per 355 ml, 151 mg per 473 ml.
• Monster Energy: 32 mg per 100 ml, so 160 mg per 500 ml.
• Sugar-free versions: same caffeine.
• A filter coffee has about 90 mg per 200 ml.
Contents
Caffeine in Red Bull
| Can | Red Bull Energy Drink | Red Bull Sugarfree |
|---|---|---|
| 250 ml | 80 mg | 80 mg |
| 355 ml | 114 mg | 114 mg |
| 473 ml | 151 mg | 151 mg |
Work out your own total: caffeine calculator.
Source: Red Bull's own FAQ pages (checked October 2026).
Caffeine in Monster
| Drink | Per 100 ml | 500 ml can |
|---|---|---|
| Monster Energy | 32 mg | 160 mg |
| Monster Energy Zero Sugar | 32 mg | 160 mg |
Source: on-pack labels (checked October 2026). Other flavours can differ. Both carry the warning "High caffeine content", which is required for drinks with more than 150 mg of caffeine per litre.
Compared with coffee
| Drink | Serving | Caffeine |
|---|---|---|
| Monster Energy | 500 ml | 160 mg |
| Red Bull | 250 ml | 80 mg |
| Filter coffee | 200 ml | about 90 mg |
| Espresso | 60 ml | about 80 mg |
| Black tea | 250 ml | about 55 mg |
Coffee and tea: EUFIC. More: How much caffeine is in coffee?
Your daily caffeine
EFSA considers up to 400 mg of caffeine a day from all sources and single doses of up to 200 mg safe for healthy adults (EFSA, 2015). Two 500 ml cans of Monster come to 320 mg. More: How much caffeine a day?
Optimal Native caffeine pouches are sugar-free and state the caffeine per pouch: Morning Energy 200 mg, Daily Flow 75 mg, Evening Relax 0 mg. More: Caffeine pouches explained
FAQ
Does Monster have more caffeine than Red Bull?
Per can, yes (160 mg vs 80 mg). Per 100 ml, both have 32 mg.
How much caffeine is in a can of Red Bull?
80 mg in a 250 ml can.
Is a Red Bull stronger than a coffee?
A 250 ml Red Bull (80 mg) has a little less than a 200 ml filter coffee (about 90 mg).