Date to age
Age Calculator
Calculate exact age from a date of birth to today or any target date, including calendar years, months, days, weeks, hours, and minutes.
Enable JavaScript to calculate results instantly in your browser.
When to use this age calculator
People use this age calculator when a form, school record, milestone, birthday plan, or health questionnaire needs a precise age rather than a rough year count.
How it works
The calculator counts full calendar years first, then full months, then the remaining days. That makes the result match the way age is normally written on official forms and everyday records.
- Use the target date field when you need age on a past or future date.
- Use the days, weeks, and hours totals for milestones and countdowns.
- Dates are calculated in your browser, so no personal date of birth is sent to a server.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth and the date you want to calculate against. The result shows full years, months, days, and total time units.
Can I calculate age on a specific date?
Yes. Change the age-at-date field to any past, present, or future date.
Does the calculator include leap years?
Yes. Calendar differences are based on real month lengths and leap years.
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