What Time Frame for the Death by Caffeine Calculator?

Death by Caffeine time frame
Ever since the invention of our Death By Caffeine calculator we are often asked one question in particular.

The one question, by orders of magnitude, that gets asked here more than any other is:

“It says that 10 bottles would kill me, but is that over a month, a day, a lifetime?!”

Let’s apply some common sense to this


If you died after a lifetime consumption of 200 cans of soda, most Americans wouldn’t make it past age 14. That’s clearly not the answer.


If you died after 200 cans of soda in a month, there would still be plenty out there who wouldn’t make it past age 30. It’s painfully easy to drink 6 cans daily, especially if you’re trying to stay awake to finish a project. Conversely, it’s about 142 cups of coffee for most coffee drinkers. That’s under 5 per day. Many people can drink more than that with few side effects. It’s not monthly.


Still not the time frame, but we’re getting warmer.


That’s actually believable. If you managed to ingest that much caffeine in one day, you won’t be feeling so hot. In fact you may be in serious trouble. Not everyone’s liver works at the same speed (caffeine sensitivity level), and some people have reported feeling the effects of caffeine for a full 12 hours – for most people this is more like 4-5 hours.

Here’s the correct answer:

It’s how much caffeine you have in your system at one time.

Yes, it’s rare for people to die from caffeine in beverages.

However, don’t actually try it!.

After 1 gram, you would be very sick indeed.

Unfortunately, there are some products that contain concentrated caffeine and these make it much easier for a person to overdose.

What Formula is This Based On?

Our Death by Caffeine calculator uses the LD50 (the lethal dose amount of a substance that will kill at 50% of the population) for caffeine. This on average is 150 milligrams of caffeine per kilogram of body weight. For most adults this equates to around 10 grams of caffeine.

Please use caffeine responsibly and adhere to the Caffeine Safety Guidelines Caffeine Informer recommends.

Get Help Quitting Caffeine

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  • Steve

    I drink about 3-4 POTS of coffee a day. I’m not talking about “sissy” coffee either. The coffee I make could peel the chrome off a car bumper. I’m 30 and have been doing this since college (10 years). Some people call me an addict. Nah, I’m just a man who loves his coffee. There haven’t been many side effects. One more thing, ADHD and caffeine are a great combination.

  • ken

    well crack i mean caffeine must really like me. i realy drink about 5-7 24 oz bottles of dew and 3-4 32 coffees every day and have been for over 20 years and i feel fine. i do know if i stop i feel like crap. it does help i work at a dinner and it is free. lol in most of these energy drinks the sugar will get to you before the caffeine will

  • BrokenAntiMatter

    Since I was about 17 I have kept a daily intake of about 3 grams or so (5 grams during colder less active seasons), It would be difficult to see 14.5grams of caffeine killing me.

  • Alex

    I do not drink coffee at all.I am 19 and a college student, get about 3-4 hours of sleep on weekdays because of the study, and few all nighters a month due to essays and such. And I do not drink coffee at all. And since high school I have not been getting enough sleep, but still can survive without coffee. I also do not drink sports or energy drinks, tea is the only coffee intake for me, and not much of that either.

    Is it not crazy, college student who does not drink coffee.

    Enthusiasm and adrenalin are usually enough to get a person through the day. The key is to take hard classes with hard tests, this way a thought of a test can keep you awake for couple nights before, and after the test.

  • Krisk

    Actually drinking the indicated amount of pure water at one time (several gallons) means a sure death :), you would not need caffeine.

  • Kris

    You’re all NUTS!!!! I don’t take in ANY stimulant of ANY kind, EVER, and I never have a problem getting through the day or staying up late if I have to. The human body is an incredible machine and with the right diet and exercise, you shouldn’t NEED these stimulants!

  • Tony

    Really, how true is this? There was a person that died from 6 cans of Red Bull and he was an athelete, with his weight, it should have taken him maybe 120 cans, not 6…….. go figure!

  • Kris

    Krisk and Kris are TWO different people!

  • Ark

    …I have pure chemical grade caffeine. I can put away 3-4 gram shots of it for kicks. To a perfectly healthy (as in not fatigued through lack of sleep); your body can handle roughly up to 39g at a time. This will destroy your liver and all, however the warnings on the side of the bottles are extreme safety warnings.
    The short story is: Unless your a freak like me and actually have the chemical C8 H10 N4 O2—Don’t worry about it. You’ll fill yourself up on any energy drink before you’ll do damage.

  • colin

    so in the last 4 or so hours i have been cramming for 2 tests, and i have consumed about 1.67g of caffeine and i am still going. actually it takes approximately 10g of caffeine in a healthy adult(at one time) to cause death.

  • bmgibben

    What’s interesting to note is that caffeine is actually a virulent poison. In nature, scientists have found that some plants create caffeine in the same manner that other plants create toxins. It is to keep insects and animals from eating it. It usually kills any insect without instincts to protect it and sickens animals who eat it. This is similar to nicotine, alcohol, and other such intoxicants. The only reason humans can ingest it recreationally is because we have hardened our resistance to the poison over centuries.

    Just thought you’d find this interesting. 🙂

  • Crushing caffeine into powder into the grams required to get an LD50 or even LD100 (Which isn’t exactly true because everyone has different tolerances to caffeine or most substances). Even before hitting LD50, your body will start to feel the terrible effects of it.

    Most of the deaths that occur from over doses of caffeine usually die from ventricular fibrillation which is the uncoordinated contractions of the cardiac muscle of the ventricles in the heart. As a result the heart fails to adequately pump blood and hypoxia will occur, normally followed by unconsciousness within 20 – 30 seconds and quickly after, death.

  • Chris

    Heh, I bought 1KG of pure USp28 grade caffine, from a site I found through ebay. Cost almost $200, but at the rate i take it (about 3G per day, I measure it with an elctric scale) it will last for quite some time.

  • It isn’t that dangerous…

    @ Tony

    “NOT for children, pregnant women, or PEOPLE SENSITIVE TO CAFFEINE.”

    @ BrokenAntiMatter

    How round are you? You’d need a pretty huge gut to consume that much caffeine. Also, 1cc of pure caffeine taken intraveiniously would kill you within 10 minutes (or less…)

  • Chris

    man, i only have about 200mg per day, if that, usually just skip a day here or there, cause it can quickly increase your blood pressure, and if you keep a steady intake, and stop, you pressure will lower too fast and you could die. just watch out for that.

  • tommy

    man i think i consume too much caffeine.
    according to the calculator, i consume 9g per day, and some times as many as 13. (my record is 17). I guess i kinda just built up a tolerance

  • dave

    turns out i recently tried 5hr energy drink, a 2 oz shot of concentrated caffeine. in the day it made me all jittery. so i decided to go and find out how much caffeine this thing had. it claimed it had approx a cup of coffee worth of caffeine. in my organic chemistry class, we did just such an experiment measuring the amount of caffeine in caffeinated drinks. turns out the stuff had 4.73g caffeine per Liter of stuff. or 140mg/oz of caffeine. that adds up to 280 total in the bottle. the LD50 for rats is 200mg per kg rat body weight, so this drink would kill a rat!! rat poison on sale under the name of energy drink. according to wikipedia, as low as 2g caffeine have killed people b4 although these are rare occurences. that means about 15 bottles of this stuf could have been the killer of one of these people. so in all actuality, you could actually die from this dam thing if you wer stupid

  • Mikul

    Dave, 200mg and 2g aren’t the same- 2g+ 2,000mg, that’s a hell of a lot of caffeine to ingest at once and if it hit you all at once (such as by popping 10 No-Doz pills), I’m sure you’d be in for an awful time, and risking serious injury or death. 280mg is like 2 cups of coffee, 2g is more equal to 20.

    Wouldn’t drinking some insanely large amount of coffee (20 cups for example) be more likely to just cause severe vomiting than any caffeine-related complication?

  • Mikul

    Er, the “+” after the 2g in my first sentence should have been an “=”, sorry 😉

  • bob

    i am about 16 and since my 2nd liver transplant i think i am resistant to caffine compleatly as the person whos liver i got was like 500 lbs. i have taken in like 4-5g of caffine in a little less then a day on most fridays.

    p.s. dont ask about the other 2 livers plz

Last Modified: September 21, 2014