Celsius Energy Drink: Complete Caffeine Content Guide

A 355 ml can of Celsius contains 200 mg of caffeine.

• One 355 ml Celsius can = 200 mg caffeine (56.3 mg/100 ml).
• 200 mg is about half of the FDA daily upper limit for healthy adults (400 mg/day).
• After an average half-life of 5.7 h, ~96 mg of that 200 mg remains at 6 hours.
• Celsius is stronger per volume than Red Bull (250 ml = 80 mg) and similar to Prime (355 ml = 200 mg), but weaker than Bang (473 ml = 300 mg).

Caffeine content in a standard Celsius can

The dataset lists Celsius at 355 ml with 200 mg of caffeine, a concentration of 56.3 mg per 100 ml. That single number is the authoritative reference for the brand's standard 12‑ounce (355 ml) can in the provided dataset. Always check the printed label if you buy a different size or a product variant.

Caffeine levels across energy drinks — side‑by‑side

Below is a compact comparison using dataset values so you can see where Celsius sits versus common energy drinks and strong coffee formats.

How Celsius compares to coffee and other sources

At 200 mg per can, Celsius has roughly twice the caffeine of a typical 240 ml drip coffee (96 mg) and is on par with a 240 ml cold brew (200 mg) in the dataset. Compared with common coffeehouse sizes, a 473 ml Starbucks Pike Place brew contains 310 mg, so a single Celsius sits below the largest brewed coffees but above most sodas and classic energy drinks like Red Bull.

Concentration matters

Because Celsius is packaged at a high concentration (56.3 mg/100 ml), smaller servings of concentrated coffee (espresso-based drinks) can still deliver similar totals: for example, a Starbucks Blonde espresso shot is 85 mg per 30 ml (very concentrated) but total serving sizes differ. Use mg per serving to compare actual intake.

How long caffeine from a Celsius lasts in your body

Population-average caffeine half-life is about 5.7 hours. Caffeine clearance is exponential: after each half-life the remaining amount halves. The table below shows approximate remaining caffeine from a 200 mg Celsius can.

Individual half‑life varies with genetics, age, liver function, pregnancy, and medications. Sources such as the Mayo Clinic and pharmacology literature document this variation.

What affects caffeine content and absorption

Celsius delivers a known 200 mg per 355 ml can in the dataset, but multiple factors change caffeine exposure across beverages: serving size, formulation, extraction method (coffee brewing method), and whether the product is an energy shot or drink. Brewing methods in the dataset range from instant coffee (62 mg per 240 ml) to nitro cold brew (215 mg per 240 ml), showing real variation.

Individual absorption

Absorption speed depends on stomach contents and formulation; liquid energy drinks like Celsius are absorbed quickly, often peaking within 30–120 minutes. Combining caffeine with food, alcohol, or certain drugs alters both peak level and half‑life.

Health considerations and safe limits

Regulatory and clinical guidance provides clear benchmarks: the FDA states 400 mg/day as a general upper limit for healthy adults; for pregnancy many authorities (including FDA and EFSA summaries) recommend limiting caffeine to about 200 mg/day. The American Academy of Pediatrics discourages caffeine use in adolescents. Use these numbers when planning intake: one Celsius (200 mg) is half of the 400 mg adult limit and essentially reaches the commonly recommended pregnancy cap.

Symptoms and cautions

Consuming more than the recommended amounts increases risk of jitteriness, palpitations, anxiety, elevated blood pressure, and sleep disruption. In rare cases, very high doses cause serious toxicity. If you have heart disease, are pregnant, take stimulants or certain antidepressants, consult a clinician before regular high caffeine use.

Practical guidance and tracking

If you drink Celsius, track your total daily caffeine from all sources: coffee, tea, sodas, pills, and supplements. The USDA FoodData Central and product labels are reliable data sources for beverage values; clinical sources like Mayo Clinic and professional guidance from FDA, EFSA and AAP cover safety thresholds. Use a tracker such as CoffeeLog to log cans, shots, and coffees automatically so you don’t unintentionally exceed limits.

For late‑day consumption: because about half the caffeine remains after ~6 hours, a 200 mg can in the late afternoon can leave ~96 mg in circulation at bedtime, often enough to disturb sleep in sensitive people. To reduce sleep impact, avoid late‑afternoon and evening doses.

Informational only: this page summarizes published product values and guidance; not medical advice. For personalized recommendations, consult a healthcare professional.

How many Celsius cans can I drink in a day and stay within recommended limits?

Two standard 355 ml Celsius cans equal 400 mg of caffeine (2 × 200 mg = 400 mg), which reaches the U.S. Food and Drug Administration's general daily upper limit for healthy adults, the FDA says 400 mg/day in its guidance.

One 355 ml Celsius can supplies 200 mg, which matches the European Food Safety Authority's 2015 single-day recommendation for pregnancy of about 200 mg/day, the EFSA states.

Safe daily limit is the recommended maximum intake for healthy adults.

Put numerically: 1 can = 200 mg (dataset value), 2 cans = 400 mg (2 × 200 mg = 400 mg) which equals the FDA 400 mg/day threshold; the EFSA notes 200 mg/day as the commonly cited pregnancy cap in 2015, so a single can reaches that pregnancy recommendation in one serving (FDA, EFSA).

If you want to plan daily intake across multiple drinks, use our caffeine half-life calculator and the per-product comparisons on the site (for example, a 240 ml cold brew is 200 mg in the dataset) to avoid accidental stacking; the site tool uses the population-average decay model described below.

If I drink a Celsius then a coffee, how do I know whether I'm still under the 400 mg limit?

Calculate remaining caffeine from the first dose with exponential decay, then add the full caffeine amount of the second beverage; if the sum is below 400 mg you are under the FDA daily cap, the FDA specifies 400 mg/day in its consumer guidance.

Example: a 355 ml Celsius (200 mg) followed 3 hours later by a Dunkin' Original Blend medium (210 mg) yields remaining caffeine from Celsius = 200 × 0.5^(3/5.7) ≈ 139 mg, so total in the body immediately after the second drink ≈ 139 + 210 = 349 mg, which is under 400 mg (dataset values used for both drinks).

First-order elimination is exponential decay where remaining amount equals dose × 0.5^(elapsed hours / half-life).

Use the formula dose × 0.5^(hours/5.7) (this site's decay model uses a population-average half-life of 5.7 hours) to test other timings; for instance, if you drink Celsius then wait 6 hours before a 240 ml cold brew (200 mg), remaining from the Celsius at 6 h is 200 × 0.5^(6/5.7) ≈ 96 mg, so immediate total would be ≈ 96 + 200 = 296 mg (dataset values), well under the FDA day limit.

For hands-on comparisons of common drinks use our side-by-side drink comparison and then apply the decay formula or the half-life calculator to estimate in-body totals at the time you plan to drink the second beverage.

How late can I drink a Celsius without disrupting sleep?

There is no universal cutoff, but numbers help: if you plan to go to bed at 11:00 pm and you drink a 355 ml Celsius at 6:00 pm (5 hours before bed), about 200 × 0.5^(5/5.7) ≈ 109 mg will remain at bedtime according to this site's decay model (population-average half-life 5.7 h), and that residual amount can be enough to affect sleep in sensitive people.

Large doses earlier in the evening are more disruptive: Drake et al. (2013) reported that a 400 mg dose taken 6 hours before bedtime reduced total sleep time by more than an hour in a controlled study, so two Celsius cans (400 mg) 6 hours before bed would likely have measurable sleep effects (Drake et al., 2013).

Sleep disruption is measurable reduction in total sleep time or sleep efficiency caused by stimulants such as caffeine.

If you want a practical rule: our Last Cup Before Bed tool uses the same decay model (5.7 h half-life) to compute the latest time for a given dose so you can target less than ~50–100 mg remaining at bedtime; many people begin to notice sleep effects with ~50–150 mg present, with individual sensitivity varying.

What happens if I mix a Celsius with a 5-Hour Energy shot?

A 57 ml 5-Hour Energy shot contains 200 mg of caffeine in the dataset, and a standard 355 ml Celsius contains 200 mg, so consuming both at once gives an immediate total of 400 mg, which equals the FDA's 400 mg/day guidance for healthy adults, the FDA states.

If you stagger them—for example, Celsius now and the shot 1 hour later—the remaining Celsius after 1 h is about 200 × 0.5^(1/5.7) ≈ 177 mg, so total ~177 + 200 = 377 mg at that time (dataset values), which is still close to the 400 mg ceiling and above many single-dose recommendations such as EFSA's 200 mg guidance for acute intake in sensitive groups (EFSA, 2015).

Energy shots are concentrated liquid supplements that deliver high caffeine in a small volume.

For planning, consult the product pages and our guide to 5-Hour Energy on this site and use the calculator to model staggered timing; the dataset shows both products at 200 mg so simultaneous use hits the common upper bound exactly.

How should people on medications or with heart conditions treat Celsius consumption?

This page is informational, not medical advice: if you have a heart condition, arrhythmia, are taking stimulants, or are on medications that interact with caffeine, speak with a clinician because your safe caffeine limit may be lower than the general adult guidance (the Mayo Clinic documents interactions and cardiovascular effects of caffeine in patient resources).

Arrhythmia is an irregular heartbeat.

The FDA's 400 mg/day limit applies to healthy adults but does not replace clinician guidance for those with cardiac disease; the Mayo Clinic lists palpitations, elevated heart rate, and interactions with some drugs as reasons to get individualized advice, and the EFSA pregnancy guidance sets 200 mg/day for pregnant people, showing how population groups differ (Mayo Clinic, EFSA, FDA).

If you are a teenager, see our caffeine safety for teenagers guide; if you are concerned about overdose or alarming symptoms, consult the emergency guidance in our caffeine overdose article and seek medical attention.

Bottom line

The dataset lists a standard 355 ml Celsius can at 200 mg of caffeine, and that single numeric fact is the central figure to use when planning intake. The U.S. Food and Drug Administration sets a 400 mg/day guidance for healthy adults, so two Celsius cans (2 × 200 mg = 400 mg) reach that daily benchmark in one day (FDA); the European Food Safety Authority's 2015 opinion highlights about 200 mg/day as the commonly cited pregnancy cap, so one can equals that pregnancy recommendation (EFSA).

To estimate how much caffeine is actually circulating after you drink a can, use the decay model this site uses: remaining mg = dose × 0.5^(hours/5.7) where 5.7 hours (342 minutes) is the population-average half-life used on this page. Example calculations: after 3 hours a 200 mg Celsius leaves ≈ 139 mg (200 × 0.5^(3/5.7)), after 6 hours ≈ 96 mg (200 × 0.5^(6/5.7)), and after 12 hours ≈ 46 mg (200 × 0.5^(12/5.7)). For quick planning use our caffeine half-life calculator or the Last Cup Before Bed tool to limit sleep disruption; for cross-product totals consult the side-by-side comparison.