Age Calculator
Calculate exact age from a birth date. Shows years, months, days, total months, total weeks, and your next birthday.
About this tool
An age calculator is useful for forms, applications, insurance, milestone planning, and simply knowing your exact age in years, months, and days. It also shows total days, weeks, and months for people who need a more precise number.
The calculation is exact to the calendar day and handles leap years automatically.
Age calculator FAQ
Does it count the day you were born? Yes, the result includes the birthday and counts forward by calendar days, so a person born on 1 January is 1 day old on 2 January.
How are leap years handled? The calculation uses the actual calendar, so 29 February birthdays are counted correctly in leap years and adjusted in common years.
Can I calculate age as of a past date? Yes. Change the As Of Date field to any date after the birth date to see the exact age at that moment.