Celsius vs C4 Energy vs Ghost Energy: which has more caffeine?

Celsius has the most caffeine of the three: 200mg per 12 oz can, against 200mg per 16 oz can for C4 Energy and 200mg per 16 oz can for Ghost Energy. It also leads per ounce, at roughly 16.7mg to 12.5mg, so the order holds whichever way you count.

Celsius vs C4 Energy vs Ghost Energy: the numbers

Sources: Celsius is 200mg per 12 oz can per Caffeine Informer (source), and the figure is carried in our Celsius guide; C4 Energy is 200mg per 16 oz can per Caffeine Informer (source), and the figure is carried in our the caffeine database; Ghost Energy is 200mg per 16 oz can per Caffeine Informer (source), and the figure is carried in our Ghost Energy guide.

Per can or per ounce: pick the number that matches how you drink

The serving sizes here are different, so the two rankings answer different questions. Per serving tells you what one purchase delivers. Per fluid ounce tells you how concentrated each sip is, which is what matters if you nurse a large one slowly or split a can. Celsius is the densest of the three at about 16.7mg per ounce; Ghost Energy is the lightest at 12.5mg.

The three head-to-head pages

Each pairing has its own page with the full math:

• Celsius vs C4 Energy, head to head
• Celsius vs Ghost Energy, head to head
• C4 Energy vs Ghost Energy, head to head

Which one should you pick?

Take Ghost Energy when you want the smallest dose of the three, C4 Energy when you want a middle number without thinking about it, and Celsius when you actually want the 200mg and know how you handle it. If you drink more than one caffeinated thing a day, the useful move is adding the day up against the 400mg reference rather than judging each drink alone.

For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

Related reading

• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Which has the most caffeine, Celsius, C4 Energy or Ghost Energy? Celsius, at 200mg per 12 oz can. C4 Energy has 200mg per 16 oz can and Ghost Energy has 200mg per 16 oz can.

Which of the three is strongest per ounce? Celsius, at about 16.7mg per fluid ounce, ahead of C4 Energy at 12.5mg and Ghost Energy at 12.5mg.

How many Celsius servings reach the FDA 400mg reference? About 2.0 of them, at 12 oz can each. The FDA cites 400mg a day as an amount generally not associated with negative effects in healthy adults. This is information, not advice.