Age Calculator: Find Your Exact Age in Years, Months and Days
How old are you exactly? An Age Calculator turns a date of birth into your precise age in years, months and days, plus how long until your next birthday.
What does the Age Calculator show?
- Years, months and days: your exact age today.
- Total days lived: every day since you were born.
- Days until your next birthday: a live countdown to the next one.
How to use it
- Choose your date of birth in the date box.
- Press Calculate age.
- Read your results.
The tool only accepts dates up to today, and it tells you if the date is not valid.
How is age worked out?
The calculator counts full years since your birth date, then the extra months, then the remaining days. If your birthday has not happened yet this year, the year count stays one lower. It also handles months of different lengths correctly.
When do you need an exact age?
- Forms and applications: schools, visas and sign-ups often ask for age on a certain date.
- Milestones: see how many days you have lived, or plan a party for a big birthday.
- Children and babies: track growth in months and days.
- Eligibility: check minimum or maximum age rules for a sport, course or job.
Leap years and February 29
Calendars add an extra day every four years, and the calculator uses real calendar dates, so leap years are included in the total days lived. People born on February 29 celebrate on different days in different places, so check the rules that apply to you.
Tips
- Double-check the date of birth. A swapped day and month gives the wrong age.
- Your birthday countdown uses your device's date, so it follows your local time.
- To find the gap between two other dates, use the Date Difference tool.
A quick example
If you were born on 15 March 1995 and today is 4 October 2026, your age is 31 years, 6 months and 19 days. The tool also shows how many days remain until 15 March, so you know exactly when to plan the next celebration.
Free and private
The calculator runs in your browser. Your date of birth is never stored or sent anywhere, and there is no sign up or login.
Frequently asked questions
Can I use it for someone else? Yes. Enter any date of birth.
Is my age shown in other calendars? No. It uses the standard calendar.