Caffeine Intake Limit Calculator
Know your safe caffeine cap.
Caffeine Intake Limit Calculator
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Calculated instantly
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What This Calculator Does
The Caffeine Intake Limit Calculator recommends a safe daily maximum based on your body weight. The European Food Safety Authority sets the safe limit at 400 mg per day for healthy adults and 3 mg per kg of body weight.
How It Works
Multiply your weight in kilograms by 3 to get your daily caffeine limit in milligrams.
Example
A 70 kg person has a safe limit of 210 mg, roughly two cups of coffee.
Formula
Limit (mg) = Weight (kg) x 3Reading the Results
Daily Caffeine Limit
The EFSA safe daily maximum based on 3 mg per kg of body weight.
Frequently Asked Questions
Is 400 mg of caffeine safe for everyone?
Healthy adults can generally tolerate up to 400 mg/day. People with heart conditions, anxiety, or sleep disorders should consult a doctor.
How much caffeine is in common drinks?
Coffee (80-100 mg/cup), espresso (63 mg/shot), black tea (40-70 mg/cup), energy drink (80-150 mg/can), cola (30-40 mg/can).
Does caffeine affect sleep?
Caffeine has a half-life of 5-6 hours. Avoid caffeine within 8 hours of bedtime for better sleep quality.