Daily Coffee Calculator
Calculate cumulative caffeine milligrams from your drinks, verify the safe limits set by the FDA (<=400mg/day), and display the five-hour half-life timer.
Drinks consumed today
Come utilizzare Calcolatore Caffeina Giornaliera
Select drinks consumed today
Use + and - buttons to indicate the number of units you've consumed of each beverage (espresso, Americano, tea, energy drink, cola, green tea, filtered coffee). Each option shows the average caffeine content per unit already.
Read total caffeine content and risk level
Total in mg updates automatically and is compared to FDA thresholds: safe up to 400mg/day, moderate between 400-600mg, high above 600mg.
Observe the half-life countdown
The section shows estimated caffeine remaining in the body after 5, 10, 15, 20 and 25 hours based on a mean half-life of 5 hours.
Suggerimenti
- If you notice high totals frequently, consider distributing caffeine intake more evenly throughout the day rather than concentrating it in a few hours.
- Remember that caffeine stays in the body for many hours after consumption: avoiding caffeinated drinks in the late afternoon/evening helps improve sleep quality according to the countdown shown.
Domande frequenti
What is the safe daily caffeine limit?
According to FDA guidelines taken from the tool, up to 400mg per day are considered safe for a healthy adult. The risk falls into the moderate category between 400-600mg and is high above 600mg. These values are general guidelines only and not personalized medical prescriptions.
How is total caffeine calculated?
The tool multiplies the number of units consumed for each drink by its average caffeine content in mg indicated next to the name and sums all contributions.
What does the half-life of 5 hours mean?
Half-life is the estimated time required for blood caffeine levels to halve. The tool uses an average half-life of 5 hours and shows how much caffeine would theoretically remain in circulation after 1, 2, 3, 4, and 5 half-lives (5, 10, 15, 20, 25 hours).
Does this calculator replace a doctor's opinion?
This is a general information tool based on average caffeine content values and FDA standard limits. It does not take into account individual health conditions (pregnancy, heart problems, caffeine sensitivity). For personalized guidance, consult a doctor or a nutritionist.
Are caffeine values for beverages always the same?
No, these are indicative average values: actual caffeine content varies based on brand, brewing method, coffee/tea amount used, and cup size. Use the numbers in the tool as an estimate only, not a certified analytical value.