Caffeine Limit
Calculator
Calculate your recommended daily caffeine limit. Find out how much is safe for your body weight and understand the threshold for potential overdose.
FDA recommends a general limit of 400mg per day for healthy adults.
How Much Caffeine Is Too Much?
Caffeine is the most widely consumed stimulant in the world. While it can improve alertness and athletic performance, too much can lead to jitteriness, insomnia, increased heart rate, and anxiety. For most healthy adults, 400mg per day (about 4 cups of coffee) is considered safe.
Weight and Sensitivity
Your body weight plays a major role in how you process caffeine. Our calculator uses a safe threshold of 6mg per kilogram of body weight. The “Danger Zone” is estimated at 150mg per kilogram, which is the theoretical lethal dose—though severe side effects begin much earlier.