Caffeine Intake Calculator
Add up your daily caffeine from coffee, tea, soda and energy drinks and compare it with the 400 mg/day guideline for healthy adults.
For general information only — not medical advice. Results are estimates; talk to a doctor or qualified health professional about your own health.
How to use
- 1Enter how many of each drink you have in a day.
- 2See your total and how it compares with the recommended limit.
How it's calculated
Total = Σ drinks × typical caffeine per serving. The FDA and EFSA consider up to 400 mg a day safe for most healthy adults; 200 mg a day in pregnancy.
Frequently asked questions
How much caffeine is safe?
Up to 400 mg a day for most healthy adults, and no more than 200 mg in pregnancy (EFSA/ACOG). Sensitivity varies a lot between people.
How long does caffeine last?
Its half-life is about 5 hours in most adults, so half of an afternoon coffee may still be in your system at bedtime.
Why do coffee numbers vary so much?
Bean type, roast, brewing method and cup size all change caffeine content. Values here are typical averages.