Enter a date of birth to see the exact age today, or on any other date.
Age isn’t just the difference between two years. Someone born in December 2000 is still 25 in early December 2026, not 26. This calculator counts complete years first, then complete months, then the leftover days, so the result matches how age is counted on official forms.
Months have different lengths, so a birthday on the 31st needs care. Someone born on January 31 completes one month on the last day of February.
Count the whole years since the birth date, then the whole months after that, then the remaining days. Month lengths are taken into account, including leap years.
In years without a February 29, this calculator treats February 28 as the birthday. Some people celebrate on March 1 instead; both are common.
Yes. Change the “age on” date to any date on or after the date of birth, for example to check how old someone will be on a specific day.