Calculator
How age is calculated
Age is the number of full years that have passed since the date of birth, plus the months and days since the last birthday. The calculator counts whole months from the date of birth first and then the remaining days, which gives the same answer as counting on a calendar.
Worked example
Someone born on 15 June 1990 is, on 3 November 2026, 36 years, 4 months and 19 days old. That is 436 months, or 13,290 days. Their next birthday is 15 June 2027, when they turn 37.
Age on any other date
Change the “Age on” date to find an age in the past or the future, for example the age on a school-entry date, a closing date for an application, or at a future milestone. It works for any date, not only today.
Born on 29 February?
In years that are not leap years, birthdays on 29 February are counted on 28 February here. Legal rules differ by country, so check the rule that applies to your situation if the exact day matters.
Everything is calculated in your browser. The dates you enter are never uploaded or stored on our servers; they only appear in a link if you choose “Copy link to this result”.
Why people check their exact age
- Forms and eligibility: age limits are often defined on a particular date.
- Milestones: find out how many days old you are, or when you reach 10,000 days. Use the Add or Subtract Days from a Date to add 10,000 days to a birth date.
- Service length: the same method gives the time since a joining date. For a plain day count use the Days Between Dates Calculator.
- Countdown to a birthday: the result shows how many days are left.
- Exact hours and minutes: the Date & Time Difference Calculator accepts a time of birth too.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth. The calculator shows your age in years, months and days as of today, or as of any other date you choose.
How many days old am I?
The table shows your age in days, weeks, months and hours.
Can I find my age on a future or past date?
Yes. Change the “Age on” date. It can be before or after today, but not before the date of birth.
Is my date of birth saved?
No. The calculation happens in your browser and nothing is sent to our servers. The date only appears in a link if you press “Copy link to this result”.
How are leap-day birthdays handled?
Birthdays on 29 February are counted on 28 February in years that are not leap years.
More date & time calculators
- Date & Time Difference CalculatorThe exact gap between two dates and times, with time zones.
- Days Between Dates CalculatorCount the days between any two dates, with or without the end date.
- Business Days CalculatorWorking days between two dates, minus weekends and public holidays.
- Weeks Between Dates CalculatorWeeks and days between two dates, plus ISO week numbers.
- Hours Between Times CalculatorHours worked between two times, with breaks, overnight shifts and decimal hours.
- Add or Subtract Days from a DateFind the date that is N days, weeks, months, years or business days away.
- All date & time calculatorsSee every calculator and which one to use.