Caffeine Calculator

This caffeine calculator will help you assess how much caffeine is in your drink and if it’s a safe amount for your body. With this tool, you can evaluate your caffeine intake and how many cups are right for you. While caffeine can provide a great boost of energy, too much can affect your health and your ability to sleep well each night. Find out how much caffeine you can safely drink today.

DAILY SAFE MAXIMUM

Your maximum is cans per day.

Based on serving

Did you know?

Caffeine acts as a central nervous system stimulant which it promotes alertness in the brain. When you take caffeine, you will notice feeling more awake and less tired. In fact, caffeine is a common ingredient in medications to treat or manage drowsiness, headaches, and migraines.

While it only takes 45 minutes for 99% of the caffeine, you will feel effects from the average energy drink or coffee for up to 4 to 6 hours. Keep this in mind when you are going to sleep. In addition to helping your brain stay alert, caffeine can delay your normal circadian sleep pattern by 40 minutes according to leading research from the MRC Laboratory of Molecular Biology. When consumed too close to bedtime, caffeine can throw a person’s entire circadian rhythm off.