Enter a valid date of birth on or before the "age at" date.
About the age calculator
This tool calculates an exact age between any two dates. Enter a date of birth and the date you want to measure to, and it returns the age in years, months, and days, along with total days and weeks lived and a countdown to the next birthday.
Frequently asked questions
- How is age calculated?
- The calculator finds the difference between the date of birth and the chosen date, accounting for varying month lengths and leap years, and expresses it in years, months, and days.
- Can I calculate age at a past or future date?
- Yes. Set the 'age at date' to any date on or after the date of birth to find the age at that point.