How old are you, exactly?
Your precise age, total days lived and countdown to your next birthday.
Quick answer: Enter your birthdate above for your exact age in years, months and days, total days lived, your birth weekday, and a countdown to your next birthday. Leap years handled precisely.
Your exact age
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Total days lived–
Next birthday in–
You were born on a –
How exact age is calculated
Age math is trickier than it looks: months have different lengths and leap years add days. This calculator borrows correctly across month boundaries.
- Exact age: years, months, days
- Totals: months, weeks and days lived
- Next birthday: countdown in days, plus your birth weekday
FAQ
How is exact age calculated?
Full years first, then remaining months and days — correctly handling leap years and varying month lengths.
What day of the week was I born?
Enter your birthdate and the calculator shows it.
Does it handle leap years?
Yes — leap days are counted exactly, so totals stay precise.
Why would I need this?
Forms, anniversaries, retirement planning — or just curiosity about your 10,000th day alive.