Energy drinks · C4
How much caffeine is in C4?
A 16 fl oz can of C4 Performance Energy has 200 mg of caffeine, as C4 states it on its own US website.
Checked 28 Oct 2026 on cellucor.com (the label image). Across the 6 C4 lines and sizes we checked: 150–300 mg per container.
One can at 75 kg: studies of caffeine and exercise use 3–6 mg per kg in one dose (225–450 mg at 75 kg). It's 50% of the FDA's 400 mg a day.
Every C4 line and size
Highest caffeine first. Open a row's flavours to see which ones share its caffeine.
| Caffeine level | One at your weight (75 kg) | Label source | |||||
|---|---|---|---|---|---|---|---|
Ultimate Energy16 fl oz can (473 mL)7 flavoursArctic Snow Cone, Frozen Bombsicle, Frost Bitten Citrus, Tropical Tundra Frost, Cherry Bomb Frost, Fruit Punch, Sour Blue Razzilla (x Godzilla) | 300 mg | 18.8 | 75% | 1.3 cans | Very high | Below research doseIn the research range400 mg or moreWithin your 225–450 mg range | cellucor.comchecked 28 Oct 2026 |
Energy Non-Carbonated12 fl oz bottle4 flavoursIcy Blue Razz, Fruit Punch, Orange Slice, Watermelon | 200 mg | 16.7 | 50% | 2.0 bottles | High | Below research doseIn the research range400 mg or more89% of your 225–450 mg range | cellucor.comchecked 28 Oct 2026 |
Energy Shot2 fl oz shot (59 mL)3 flavoursFrozen Bombsicle, Grape Popsicle, Hawaiian Punch Fruit Juicy Red | 200 mg | 100 | 50% | 2.0 shots | High | Below research doseIn the research range400 mg or more89% of your 225–450 mg range | cellucor.comchecked 28 Oct 2026 |
Performance Energy16 fl oz can (473 mL)23 flavoursStrawberry Blast, Strawberry Watermelon Ice, Frozen Bombsicle, Cereal Killer, Sour Gummy Splash, Mango Fuego, Cosmic Rainbow, Orange Slice, Midnight Cherry, Arctic Snow Cone, Cherry Limeade, Grape Frost, Pink Lemonade, All Hopped Up, JOLLY RANCHER Green Apple, JOLLY RANCHER Watermelon, JOLLY RANCHER Blue Razz, JOLLY RANCHER Peach, Popsicle Grape, Popsicle Cherry, Popsicle Hawaiian Pineapple, Popsicle Orange Creamsicle, Hawaiian Punch Fruit Juicy Red | 200 mg | 12.5 | 50% | 2.0 cans | High | Below research doseIn the research range400 mg or more89% of your 225–450 mg range | cellucor.comchecked 28 Oct 2026 |
Smart Energy12 fl oz can (355 mL)7 flavoursPeach Mango, Cherry Berry Lime, Watermelon Burst, Strawberry Guava, Blue Raspberry (Digital Exclusive), Black Cherry (Digital Exclusive), Tropical Passionfruit | 200 mg | 16.7 | 50% | 2.0 cans | High | Below research doseIn the research range400 mg or more89% of your 225–450 mg range | cellucor.comchecked 28 Oct 2026 |
Performance Energy12 fl oz can (355 mL)4 flavoursStrawberry Blast, Cosmic Rainbow, JOLLY RANCHER Green Apple, JOLLY RANCHER Watermelon | 150 mg | 12.5 | 38% | 2.7 cans | Moderate | Below research doseIn the research range400 mg or more67% of your 225–450 mg range | cellucor.comchecked 28 Oct 2026 |
Some amounts were read off C4's label images and are still being checked against the can.
Your bodyweight
Caffeine studies use 3–6 mg per kg in one dose. Enter your weight and the table shows what one can or shot is for you. Worked out in your browser; nothing is sent or stored.
Adding coffee or a pre-workout? Use the full caffeine calculator.
Where the caffeine comes from
Caffeine sources on the label, as printed:
- Caffeine Anhydrous
- C4 Ultimate Energy, 16 fl oz can: total 300 mg · “300MG CAFFEINE”
- C4 Energy Shot, 2 fl oz shot: total 200 mg · “C4 Performance Energy® Blend [CarnoSyn® Beta-Alanine, BetaPower® Betaine Anhydrous, Caffeine Anhydrous (200mg)] 3.45g”
- C4 Performance Energy, 16 fl oz can: total 200 mg · “CAFFEINE 200mg PER 16 fl oz (1 CAN)”
The brand's page names no caffeine source for:
- C4 Energy Non-Carbonated, 12 fl oz bottle: total 200 mg · “200 mg Caffeine per bottle”
- C4 Performance Energy, 12 fl oz can: total 150 mg · “each can packs 150mg of caffeine”
Caffeine sources on the label, as printed:
- Natural caffeine from green coffee bean extract
- C4 Smart Energy, 12 fl oz can: total 200 mg · “Made with 200mg of natural caffeine‡ (‡ Natural caffeine from green coffee bean extract.)”
Compared with pre-workouts
Pre-workouts with 175–225 mg of caffeine in one serving, within 25 mg of C4 Performance Energy, 16 fl oz can, in our ranking by dose.
- Huge Supplements Wrecked 188 mg per serving
- Jocko Fuel Pre-Workout 200 mg per serving
- Transparent Labs BULK 200 mg per serving
- RAW Nutrition CBUM Essential Pre 200 mg per serving
- Thorne Advanced Pre-Workout 200 mg per serving
What else is on the label
Amounts per container, as printed. An ingredient is graded only where we have a research dose for it; vitamins and minerals aren't graded here.
C4 Ultimate Energy, 16 fl oz can (3 more)
| Ingredient | Per can | Verdict |
|---|---|---|
| Vitamin B12 | 6 mcg | Not graded |
| Betaine Anhydrous | Not stated | Hidden in a blend |
| Beta-Alanine | Not stated | Hidden in a blend |
Sold with Nutrition Facts (a beverage).
C4 Energy Non-Carbonated, 12 fl oz bottle (caffeine only)
The brand's page gives the caffeine for this line, and we didn't find its full facts panel there.
Sold with Nutrition Facts (a beverage).
C4 Energy Shot, 2 fl oz shot (4 more)
| Ingredient | Per shot | Verdict |
|---|---|---|
| Vitamin B12 (as Cyanocobalamin) | 6 mcg | Not graded |
| C4 Performance Energy® Blend | 3.45 g | Not graded |
| Beta-Alanine | In a blend, amount not disclosed | Hidden in a blend |
| Betaine Anhydrous | In a blend, amount not disclosed | Hidden in a blend |
Sold with Supplement Facts (a dietary supplement).
C4 Performance Energy, 16 fl oz can (3 more)
| Ingredient | Per can | Verdict |
|---|---|---|
| Vitamin B12 | 6 mcg | Not graded |
| Betaine Anhydrous | Not stated | Hidden in a blend |
| Beta-Alanine | Not stated | Hidden in a blend |
Sold with Nutrition Facts (a beverage).
C4 Smart Energy, 12 fl oz can (caffeine only)
The brand's page gives the caffeine for this line, and we didn't find its full facts panel there.
Sold with Nutrition Facts (a beverage).
C4 Performance Energy, 12 fl oz can (caffeine only)
The brand's page gives the caffeine for this line, and we didn't find its full facts panel there.
Sold with Nutrition Facts (a beverage).
Questions
How much caffeine is in a can of C4?
A 16 fl oz can of C4 Performance Energy has 200 mg. The C4 lines we checked range from 150 to 300 mg.
Which C4 has the most caffeine?
C4 Ultimate Energy, 16 fl oz can: 300 mg.
How much caffeine is in C4 per fl oz?
12.5–100 mg per fl oz, worked out from each label's caffeine and the container's stated volume.
How many cans of C4 Performance Energy add up to 400 mg?
2.0 cans of the 16 fl oz size. The FDA cites 400 mg a day as an amount not generally linked to negative effects for most healthy adults.
Where does C4's caffeine come from?
The labels print these caffeine sources: Caffeine Anhydrous; Natural caffeine from green coffee bean extract.