Caffeine: How Much Is Safe?
Up to 400 mg a day is considered safe for most adults.
Where it comes from
A cup of brewed coffee has about 95 mg, a shot of espresso 63 mg, tea 47 mg and an energy drink around 80 mg or more.
Limits
Healthy adults should keep under 400 mg daily. Pregnant people should limit it to 200 mg, and children and teens should have much less.
Side effects
Too much can cause jitters, palpitations, anxiety and poor sleep. Taper gradually to avoid withdrawal headaches.
Try it: Daily Caffeine Intake Calculator
Example with sample values. Open the full calculator →
You are within the 400 mg daily limit for healthy adults. Limit to 200 mg if pregnant.
Educational content only. This article does not replace advice from a qualified health professional. Medical disclaimer.