How much caffeine is in Ghost Energy? A 16 oz can of Ghost Energy has 200 mg of caffeine, and the 8.4 oz half can has 100 mg, according to the nutrition labels on Ghost's own product pages. Ghost Energy is already zero sugar, so there isn't a separate "Zero Sugar" version with a different amount. A full can is about two 8 oz cups of brewed coffee.
At an average 5-hour half-life, 200 mg takes 15 hours to fall below 25 mg. For an 11 PM bedtime, that makes a full can a breakfast drink. The caffeine calculator works out your own cutoff for any can and bedtime.
Free toolCaffeine Cutoff CalculatorHow much caffeine is still in you at bedtime, and your latest cup.How much caffeine is in a can of Ghost Energy?
Ghost lists 200 mg of natural caffeine per 16 oz can. The label on Ghost's OG product page shows it under "Amount per can" as natural caffeine from coffee bean, with a serving size of one 16 fl oz can. We checked it in November 2026.
| Ghost Energy | Can size | Caffeine (Ghost's label) |
|---|---|---|
| Ghost Energy (full can) | 16 fl oz | 200 mg |
| Ghost Energy Half Can | 8.4 fl oz | 100 mg |
| For comparison: brewed coffee | 8 fl oz | about 95 mg |
Ghost sells many flavors and collaborations in the 16 oz can. We read the labels for the OG full can and the OG Colada half can. For any other flavor or collaboration, the label on that can is the number to trust.
Does Ghost Energy Zero Sugar have less caffeine?
No. Every Ghost Energy can is zero sugar, and the 16 oz can still has 200 mg of caffeine. Ghost markets the whole line with "zero sugars" on the can. Taking the sugar out doesn't take the caffeine out, so for sleep a zero sugar can counts as a full dose of caffeine.
How much caffeine is in a Ghost Energy half can?
The 8.4 oz Ghost Energy half can has 100 mg of caffeine, printed as "100MG caffeine per can" on the label. That's half the full can and about the same as one 8 oz cup of coffee.
It's also a little more than a small 8.4 oz Red Bull at 80 mg. If you like Ghost but want an afternoon option, the half can is the one that can fit: for an 11 PM bedtime it drops below 25 mg if you finish it by about 1 PM.
Is Ghost Energy stronger than Red Bull or Monster?
Yes, per can. A 16 oz Ghost has 200 mg, compared with 151 mg in a 16 oz Red Bull and 160 mg in a 16 oz Monster. That's roughly a quarter more than either.
| Drink (16 oz) | Caffeine |
|---|---|
| Red Bull | 151 mg |
| Monster Energy | 160 mg |
| Ghost Energy | 200 mg |
For more on the two biggest brands, see Monster vs Red Bull caffeine or how much caffeine is in Red Bull.
How much Ghost caffeine is left at bedtime?
A full Ghost at 2 PM still leaves about 57 mg in you at 11 PM. The table uses the calculator's math: remaining caffeine = dose x 0.5^(hours / 5), for an 11 PM bedtime.
| Can at | Half can (100 mg) | Full can (200 mg) |
|---|---|---|
| 8 AM | 13 mg | 25 mg |
| 10 AM | 16 mg | 33 mg |
| Noon | 22 mg | 44 mg |
| 2 PM | 29 mg | 57 mg |
| 4 PM | 38 mg | 76 mg |
| 6 PM | 50 mg | 100 mg |
This site uses about 25 mg at bedtime as a sensible ceiling. It isn't an official limit, just a useful line. A full can at 6 PM leaves about as much caffeine at bedtime as a fresh cup of coffee.
What's the latest time to drink a Ghost Energy?
For an 11 PM bedtime, finish a 16 oz Ghost by about 8:00 AM and a half can by about 1:00 PM. These are the times each can falls below 25 mg by bed:
| Bedtime | Half can (100 mg) | Full can (200 mg) |
|---|---|---|
| 10:00 PM | 12:00 PM | 7:00 AM |
| 10:30 PM | 12:30 PM | 7:30 AM |
| 11:00 PM | 1:00 PM | 8:00 AM |
| Midnight | 2:00 PM | 9:00 AM |
In hours before bed, that's 10 hours for the half can and 15 hours for the full can. These are averages. If caffeine tends to linger for you, set the calculator to high sensitivity and the cutoffs move earlier.
Falling asleep fine doesn't mean the can had no effect. In an at-home sleep study, a large caffeine dose taken 6 hours before bed cut total sleep by more than an hour. For more, see energy drinks and sleep.
How many Ghost Energy drinks a day is safe?
For healthy adults, the FDA cites 400 mg of caffeine a day as an amount not generally linked to negative effects. That's two full Ghost cans with nothing else, or one can plus a couple of cups of coffee.
Ghost's cans say they are only intended for people 18 years or older. The FDA notes that medical experts advise against energy drinks for children and teens, and that too much caffeine in young people can cause a racing heart, anxiety and sleep problems. If you're pregnant, breastfeeding, have a heart condition or take medications, talk to your health care provider about a lower limit. To add up a whole day, see how much caffeine is too much.