Nutrition & Hydration
Caffeine limit calculator
Estimate your safe daily caffeine limit by body weight using FDA and EFSA guidelines — plus how your intake compares.
Your inputs
Results
Live result
Safe daily max
400 mg
FDA: 400 mg | EFSA: 3 mg/kg single dose
Your intake
200 mg
≈ 8 oz brewed coffees
2.1 cups
Over FDA limit
Within limits
Medical disclaimer: This tool is for general educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health.
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