FREE ONLINE CALCULATOR
Enter a date of birth to calculate exact age in years, months, and days. You also get total days lived and the time until the next birthday.
The calculator compares the birth date with a selected date using complete calendar months, then remaining days. If the matching day does not exist in a month, it uses that month's last day. February 29 birthdays use February 28 in non-leap years. Total elapsed days use UTC calendar dates. The default comparison date is today in UTC. This is a calendar convention for personal planning, not a legal determination of age or eligibility.
January 31 to March 1, 2026 is one calendar month and one day. January 1, 2000 to January 1, 2026 is 26 years.
The tool compares calendar years, months, and days between the birth date and the selected date rather than dividing total days by 365.
Yes. February 29 is used in leap years and February 28 is the birthday anniversary in non-leap years. Legal conventions may differ.
Complete months use the last available day when needed. For example, January 31 to March 1, 2026 is one month and one day because February ends on the 28th.
Yes. Choose any valid comparison date on or after the date of birth. The birth date itself gives zero years, months and days.