Daily caffeine calculator
How much caffeine you’ve had today.
How it’s worked out
Per EFSA: up to 400 mg a day is safe for healthy adults, 200 in pregnancy. Even 100 mg close to bedtime can disturb sleep. The average half-life is about 4 hours, ranging from 2 to 8. Amounts: espresso 80 mg, filter coffee 90, tea 50, cola 40, energy drink 80. You can also write “08:00 2 espresso” or “16:00 120mg”.
Sources