Age Calculator
Everything runs in your browser. Your data never leaves your device.
What this age calculator does
Enter your date of birth and the tool shows your exact age in years, months and days. It also shows how many months and days you have lived in total and how many days remain until your next birthday. You can change the second date to find your age at any point in the past or future, for example for a job form, school entry or retirement plan.
How to use it
- Pick your date of birth.
- Leave the second date as today, or choose another date.
- Read your age and the extra figures below it.
How the calculation works
The calculator counts whole years first, then whole months, then the remaining days, always using the real number of days in each month. Total days lived is the exact number of calendar days between the two dates, including leap days. Days until your next birthday counts forward to the next occurrence of your birth day and month.
Example: born 15 May 1990, on 20 August 2024 the age is 34 years, 3 months and 5 days, which is 411 months or 12,516 days. The next birthday is 268 days away.
Notes
Dates use the Gregorian calendar and are not affected by time zones. The date picker follows your device’s language and format, but the results always use Western digits. Your date of birth stays in your browser and is never sent anywhere.
Frequently asked questions
How is exact age calculated?
The tool counts the full years from your birth date, then the full months and remaining days up to the chosen date, using the real length of each calendar month.
Can I find my age on a past or future date?
Yes. Change the "Age on this date" field to any date after your birth date. By default it uses today.
What happens if I was born on 29 February?
Your age is counted correctly in days and months. In years that are not leap years, your next birthday is counted on 28 February.
Does this calculate my Hijri age?
Not yet. This tool uses the Gregorian calendar. A Hijri age is about 3% larger because the Hijri year is shorter, and a Hijri age feature is planned with our calendar tools.