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Age Calculator
Your exact age in years, months and days — plus a countdown to your next birthday.
Enter your date of birth to see your exact age.
Formula
Age = current date − birth date, expressed in years, months and days
How to calculate
- 1Subtract the birth year from the current year.
- 2If the birthday has not happened yet this year, subtract one year.
- 3Count full months since the last birthday, then remaining days.
- 4Total days lived = current date − birth date in days.
How to use this calculator
- 1Enter your date of birth.
- 2Optionally change the 'as of' date for an age at a future event.
- 3See your exact age in years, months and days.
- 4Milestones like your next birthday and 10,000-day mark are shown too.
Examples
Exact age
Born June 15, 1990, on September 23, 2026 → 36 years, 3 months, 8 days.
Future date
Set the 'as of' date to December 31 to check an age requirement for the end of the year.
Common questions
Does it count leap years?
Yes — the calculation uses real calendar dates, so leap days are included automatically in your total days lived.
Why do some sites show a different age?
Sites that approximate a year as 365 or 365.25 days drift slightly; this calculator uses exact calendar arithmetic.
Can I calculate age at a past or future date?
Yes — change the 'as of' date to check your age on any day, past or future.
