How much caffeine is in Celsius (12oz can)?
中文：Celsius 能量饮料（12 盎司）
Caffeine content
200 mg
per 12 fl oz (355 ml)
About this drink
Celsius packs the most caffeine per ounce of mainstream energy drinks — 200 mg in 12 oz versus Monster's 160 mg in 16 oz. Marketed as a 'fitness drink' but the caffeine load is significant.
Ingredients: Caffeine, guarana, taurine, green tea extract, ginger
When will it clear your system?
200 mg in 12oz is rapid-absorption — peaks within 30-45 min. Don't drink after 2pm if sleep matters; the half-life math means ~100 mg circulating at 7pm.
Based on caffeine's 5-hour half-life, a Celsius (12oz can) consumed at 2:00 PM drops below the sleep-safe threshold (~20 mg) by approximately 06:37 the same evening.
Where this fits in a daily limit
That's roughly 100% of the 200 mg pregnancy guideline and 50% of the 400 mg general adult daily limit. One drink uses most of a pregnancy-safe day.
See our pregnancy caffeine guide or half-life sleep math for the deep dive.
How it compares
| Drink | Caffeine |
|---|---|
Celsius (12oz can) Celsius | 200 mg |
| Monster Energy (16oz can) Monster | 160 mg |
| Red Bull (8.4oz can) Red Bull | 80 mg |
| Bang Energy (16oz can) Bang | 300 mg |
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Learn more about SipNoteFrequently asked questions
How much caffeine is in a Celsius (12oz can)?
A 12 fl oz (355 ml) Celsius (12oz can) contains approximately 200 mg of caffeine. Actual values may range from 200 to 200 mg depending on preparation and source variation.
Is Celsius (12oz can) safe during pregnancy?
The current ACOG and NHS guideline is under 200 mg of caffeine per day during pregnancy. A single Celsius (12oz can) uses most of the daily pregnancy allowance. Always consult your obstetrician for personalized advice.
When should I stop drinking Celsius (12oz can) for sleep?
Caffeine has a 5-hour half-life. To have under 20 mg circulating at bedtime (the typical sleep-safe threshold), stop drinking Celsius (12oz can) about 17 hours before sleep. 200 mg in 12oz is rapid-absorption — peaks within 30-45 min. Don't drink after 2pm if sleep matters; the half-life math means ~100 mg circulating at 7pm.
Celsius (12oz can) vs Monster Energy (16oz can) — which has more caffeine?
Celsius (12oz can) contains 200 mg per serving; Monster Energy (16oz can) contains 160 mg per 16 fl oz (473 ml). Celsius (12oz can) is the stronger of the two.
Does Celsius (12oz can) keep you awake?
200 mg is high caffeine. For sleep-sensitive people, Celsius (12oz can) after noon may affect sleep onset and quality.
Caffeine values shown are typical for the listed serving size. Actual content varies by preparation, brewing method, batch, and brand reformulation. Not medical advice — consult a healthcare provider for personalized guidance.