Enter a date of birth and a reference date (today by default) to calculate the exact age in years, months, and days — plus days until the next birthday.
Age is calculated by counting the number of complete years, then months, then days between the birth date and the reference date. This matches the conventional way people state their age — a person born on March 15, 1990 turns 35 on March 15, 2025, regardless of leap years in between.
The Age Calculator tells you exactly how old you are — or how old anyone or anything is — down to the day. Enter a birthdate and a target date (defaulting to today), and the calculator instantly returns the precise age in years, months, and days. It handles leap years, month-length differences, and time zone subtleties automatically, so you always get an accurate result. This tool is useful for filling out official forms, figuring out whether someone meets an age requirement, planning milestone birthday events, or simply satisfying curiosity. Parents tracking a child's development, HR teams verifying eligibility criteria, developers testing date logic, and genealogy researchers tracing family histories all benefit from having an accurate age calculation at hand without reaching for a calendar and doing mental arithmetic.
Enter the birthdate (or start date) in the first field and leave the second field set to today, or change it to any target date you want. Click Calculate and the tool returns the exact age in years, months, and days. You can swap dates freely to find the gap between any two points in time.