Every month this calculator is used almost a million times by around 400,000 people. The top 10 items selected are: Red Bull, 5 Hour energy, Monster, Coca-cola Classic, Mountain Dew, Coffee (brewed), 7-Up, Doctor Pepper, Rockstar, and Diet Coke.

The calculator is based on the amount of the product in your system at one time. Obviously your stomach cannot hold the amount of liquid required. However medications with caffeine can be dangerous. Be wise.

Click on its link to be taken to the caffeine information page.

Our database only contains items containing caffeine, so it may be that your product has no caffeine. Take a look at the caffeine charts here. Also check our drink graveyard for drinks that are no longer available or who did not disclose caffeine amounts.

We have items from the USA, Canada, UK, Australia, New Zealand, and parts of continental Europe.

Yes. Caffeine can be lethal with a high enough dosage, and you can get very sick from overconsuming caffeine. People have died from overdosing on caffeine pills. Please be very careful.

This tool is intended as humor – and is for entertainment purposes only. Nothing on here should be construed as medical advice or information. Do not try this at home. If you actually try this and end up dying after only 140 energy drinks instead of 143, its not our fault.
All brand names are property of their registered trademark and copyright owners. Some drinks have the potential to be very, very dangerous before lethal levels: do not be stupid.