Find your exact age in years, months, and days. See total days lived, days until your next birthday, and your age in months, weeks, and hours.
Fill in the details and
your result appears here.
Pick from the date picker or type in YYYY-MM-DD format.
Today calculates current age. Custom lets you calculate age on any past or future date.
See age in years, months, days — plus weeks, total days, and days until next birthday.
Age is calculated by subtracting the birth date from today (or the chosen date), accounting for leap years and month-end edge cases.
The calculation correctly handles months with different lengths and leap year birthdays.
Subtract your birth date from today. This calculator handles months of different lengths and gives years, months, and remaining days precisely.
On non-leap years, the birthday is treated as March 1 for calculation purposes. Most legal systems also use Feb 28 or Mar 1 in non-leap years.
Yes — use Custom Date mode and pick any date. Useful for calculating age at a historical event or milestone.
Approximately 9,125 days, or 9,131 days if the period includes 6 or 7 leap years. This calculator counts exactly.