Calculate exact age from birth date

How to Use This Calculator

An age calculator finds your exact age in years, months and days from your date of birth to a chosen date. It also shows total days lived and the days until your next birthday.

Formula: Age = target date − date of birth, counted in full years, then remaining months and days.

Example: Born on March 15, 1990, you are 36 years, 6 months and 29 days old on October 14, 2026, and your next birthday is in 152 days.

FAQs:

• How is age calculated? Count complete years first, then complete months, then remaining days.
• How do leap years affect age? A February 29 birthday is usually observed on February 28 or March 1 in non-leap years.
• Do different countries count age differently? Yes. East Asian age reckoning (Korea until 2023, for example) differed. Mention this on the page.
• Can I find age on a past or future date? Yes. Change the “age at date” field.