Age calculator
Enter a date of birth to get the exact age, the number of days lived and the time until the next birthday.
How to calculate your exact age
Age is calculated by first counting the full years since the date of birth, then the months and days left up to the calculation date. This calculator does it for you and also shows the total in months, weeks and days.
What is an age calculation for?
To fill in an official form, check an age requirement (adulthood, retirement, enrolment, exams), find a child's age in months or see how many days are left before a birthday. You can also change the calculation date to get the age on a past or future date.
What about a birth on 29 February?
In non-leap years, this calculator counts the birthday as 1 March. The legal rule can vary by context: if in doubt, check with the organisation concerned.
Frequently asked questions
How do I calculate my exact age?
Count the full years since birth, then the remaining months and days up to the calculation date.
Can I calculate the age on another date?
Yes, change the “Calculate age on” date to get the age on a past or future date.
How do I calculate a child's age in months?
Enter the date of birth: the result shows the age in years, months and days, plus the total in months.
Is my data saved?
No. The calculation runs in your browser and nothing is sent to a server.
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