Caffeine Calculator

How much of your favorite drink is too much? How much is deadly?

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Coffee drinker? Use the coffee calculator to show the optimum amount of coffee you should be drinking.

How Do You Calculate Daily Safe Maximum?

We’ve used the latest research to determine the appropriate amount of daily caffeine.

For a single dose, health authorities recommended that you consume no more than 200 mg of caffeine at one time.  Calculate your safe limits here.

Recommendations for caffeine levels are for 18 years of age or over. See more about caffeine limits for children and teens.

What Are The Most Popular Items?

We don’t know, because we don’t track usage on this calculator. However, based on visits to the site in general, the most popular are likely to be: Red Bull, Monster, Coca-cola Classic, Mountain Dew, Coffee (brewed), Espresso Coffee, Dr Pepper, Rockstar, and Diet Coke.

Do Any Foods Contain Caffeine?

There are plenty but they are not included in the caffeine calculator. However, we maintain an extensive list of caffeine in food here.

How Much Caffeine is in These Drinks?

Once you calculated your item, just click it for more detailed caffeine information about the drink in question.

Can Caffeine Really Kill You?

Yes. Caffeine can be lethal with a high enough dosage, and you can get very sick from over-consuming caffeine. People have died from over-consuming caffeine (especially when other health issues are present). Please be very careful, caffeine is a drug. 

What’s The Time Frame For Lethal Dose?

A lethal dose is based on the LD50 for caffeine and it’s the amount of the caffeine that has to be in your system at one time. More…

Consuming Too Much Caffeine?

Need help reducing caffeine (or quitting entirely)?
  1. Wean CaffeineDownload our free eBook Awake - it'll help you understand what caffeine is (or isn't) doing for you.
  2. Consider trying the Wean Caffeine supplement (something we helped get to market). It helps avoid the painful withdrawal symptoms that occur when quitting caffeine.

Medical Disclaimer

By using this calculator you agree to our terms of use. This tool demonstrates the risks of caffeine in high doses. Overdosing on caffeine can make you very sick. Do not be stupid. If you have any concerns about your caffeine consumption you should see your medical professional. The contents of the Caffeine Informer site should not be construed as medical advice or information, and the owners of the site take no liability for the caffeine consumption of individuals using the site.