Age calculator
Enter a date of birth and comparison date to calculate age and the next birthday.
Calculate age
Age from date of birth
The age calculator compares a date of birth with a selected date and returns age in full years, months and days.
Next birthday
The calculator can also show when the next birthday occurs and how many days remain until it. Leap-year dates are handled as calendar dates by the browser date logic.
How to use the result
Choose the date of birth and the comparison date you want to use. For a current age, use today's date. For a future or past age, change the comparison date to match the situation you are checking.
Calendar details
Age is shown as completed years, months and days. This is useful when the exact calendar date matters more than an approximate age in decimal years.
Not a legal decision
The result is a calendar calculation. It does not decide legal age limits, eligibility rules or official identity information.