Enter a date of birth to see the exact age in years, months and days immediately.
Age is calculated as of today. Exact calendar years, months and days are used rather than dividing by 365.
The calculator counts full calendar years first, then full calendar months after the last birthday, and finally the remaining days. This is why an exact age can differ from simply dividing total days lived by 365.
Use “Use another date” when you need an age on a past or future date instead of today. For February 29 birthdays, anniversary dates in non-leap years are clamped to the last valid day of February for calculation purposes.
This makes the calculator useful for questions such as “how old am I?”, age-at-event calculations, eligibility dates and birthday planning.
Yes. Select “Use another date” and enter the date on which you want the person’s age calculated.
In non-leap years, the calculation uses the last valid day of February when it needs the birthday anniversary date.
Calendar years and months have different lengths, and leap years add an extra day. Exact age is therefore calculated using calendar boundaries rather than a fixed 365-day year.