Age and days-between-dates calculator

How exact age is calculated

Exact age is obtained by subtracting the date of birth from today's date, respecting months of different lengths and leap years: first the complete years, then the complete months of the current year, and finally the remaining days of the month.

The "days between dates" mode counts the calendar days separating any two dates — useful for administrative deadlines, contract lengths, holiday days or counting down to an event.