CELSIUS
How much caffeine is in CELSIUS Energy Drink?
Data checked against the source on 2026-10-03 by Oleksii Y.
One 12 fl oz can of CELSIUS Energy Drink has 200 mg of caffeine, according to CELSIUS.
How CELSIUS Energy Drink compares
- Strength: 56 mg per 100 ml.
- One 12 fl oz can has as much caffeine as about 2 cups of brewed coffee, which has 94.8 mg per 8 fl oz cup.
How much will be left at bedtime?
1 × 12 fl oz can of CELSIUS Energy Drink
Left at 11:00 PM (8 h later), average metabolism
≈ 66 mg
Range 31–100 mg (fast to slow metabolism)
To be at 50 mg or less by bedtime, have 200 mg by 12:15 PM (average) or 6:15 AM (slow metabolism).
What sleep studies found near this dose
- Gardiner et al. 2023 (meta-analysis): To avoid losing sleep time, the authors suggest a coffee (107 mg per 250 ml) at least 8.8 hours before bed.
- Gardiner et al. 2023 (meta-analysis): For a pre-workout serving (217.5 mg), the authors suggest at least 13.2 hours before bed.
Estimate from a simple model: half-life of 3, 5 or 8 hours, 50 mg bedtime target. How we calculate
How long does CELSIUS Energy Drink stay in your system?
Our model halves caffeine every 5 hours for average metabolism, and every 3 or 8 hours for fast or slow metabolism. From one 12 fl oz can of CELSIUS Energy Drink (200 mg), about 100 mg is still in your body 5 hours later and about 50 mg after 10 hours. If you clear caffeine slowly (an 8-hour half-life), about 84 mg is left after 10 hours.
Estimated caffeine left at 11:00 PM from one 12 fl oz can (200 mg), using a half-life of 5 hours for average metabolism and 3 to 8 hours for the range. How we calculate
| Had at | Left at bedtime (average) | Range |
|---|---|---|
| 8:00 AM (15 h before bed) | ≈ 25 mg | 6–55 mg |
| 12:00 PM (11 h before bed) | ≈ 44 mg | 16–77 mg |
| 3:00 PM (8 h before bed) | ≈ 66 mg | 31–100 mg |
| 6:00 PM (5 h before bed) | ≈ 100 mg | 63–130 mg |
How many fit in a day?
Reference amounts are for caffeine from all sources combined. Counted at the upper end of the stated amount, one serving at a time:
- Up to 400 mg a day for most healthy adults (FDA, EFSA): about 2 servings.
- Up to 200 mg at one time for healthy adults (EFSA): about 1 serving in one go.
- Up to 200 mg a day in pregnancy (EFSA, NHS): about 1 serving.
These are reference amounts for groups of people, not a personal limit. Some people feel jittery or sleep worse on much less. See the cutoff calculator for timing.
Good to know
CELSIUS states that its Essentials drinks contain 270 mg of caffeine per can, more than the original 200 mg.
CELSIUS Energy Drink vs other energy drink drinks
- Energy drink: CELSIUS Energy Drink has more caffeine than energy drink per 12 fl oz can: 200 mg vs 41–246 mg.
- Alani Nu Energy Drink: CELSIUS Energy Drink has the same amount of caffeine as Alani Nu Energy Drink per 12 fl oz can: 200 mg vs 200 mg.
- GHOST Energy: CELSIUS Energy Drink has more caffeine than GHOST Energy per 100 ml (56 vs 42 mg). CELSIUS Energy Drink: 200 mg per 12 fl oz can; GHOST Energy: 200 mg per 16 fl oz can (473 ml). Per serving the order evens out, because the servings differ in size.
- PRIME Energy: CELSIUS Energy Drink has more caffeine than PRIME Energy per 100 ml (56 vs 42 mg). CELSIUS Energy Drink: 200 mg per 12 fl oz can; PRIME Energy: 200 mg per 16 oz can. Per serving the order evens out, because the servings differ in size.
Common questions
How much caffeine is in CELSIUS Energy Drink?
CELSIUS gives 200 mg of caffeine per 12 fl oz can.
How many CELSIUS Energy Drink servings can I have in a day?
The FDA and EFSA cite up to 400 mg of caffeine a day, from all sources combined, for most healthy adults. At 200 mg per 12 fl oz can, that is about 2 servings if CELSIUS Energy Drink is your only source. In pregnancy the reference is 200 mg a day.
How late can I drink CELSIUS Energy Drink?
With an 11:00 PM bedtime, our model suggests having one serving by about 12:15 PM for average metabolism, or 6:15 AM if you clear caffeine slowly. This is an estimate, not a rule.
Does CELSIUS Energy Drink have more caffeine than Energy drink?
CELSIUS Energy Drink has more caffeine than energy drink per 12 fl oz can: 200 mg vs 41–246 mg.
How long does CELSIUS Energy Drink stay in your system?
Of the 200 mg in one 12 fl oz can, roughly 100 mg remains after 5 hours and 50 mg after 10 hours with our average 5-hour half-life. From fast to slow metabolism, 10 hours later it is between 20 and 84 mg.
Where the number comes from
- Essential Facts. CELSIUS. "CELSIUS & CELSIUS Vibe beverages contain 200 mg of caffeine per can"; 400 mg is "the equivalent to two 12oz cans" Accessed 2026-10-02. Source ↗
Recipes and labels change. If a number here no longer matches the label, the label wins.
General information, not medical advice
If you feel unwell after caffeine — for example chest pain, a fast or irregular heartbeat that does not settle, fainting, confusion or trouble breathing — get urgent medical help. If you are pregnant, take medication or have a heart, liver or anxiety condition, ask a doctor or pharmacist what amount is right for you.
Sources
- U.S. Food and Drug Administration (2024). Spilling the Beans: How Much Caffeine is Too Much? FDA Consumer Updates. fda.gov ↗
- European Food Safety Authority. Caffeine | EFSA. EFSA topic page (summary of the 2015 Scientific Opinion on the safety of caffeine). efsa.europa.eu ↗
- NHS. Foods to avoid in pregnancy. NHS. nhs.uk ↗
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