Age Calculator
Find your exact age — or the age difference between any two dates — in years, months, days, hours and minutes.
How to use the Age Calculator
- Enter your inputs into the Age Calculator above.
- Results update instantly as you type — no submit button needed.
- Adjust any value to see how the result changes in real time.
How age is calculated
The calculator subtracts the start date from the end date and breaks the result into calendar units. Months and years are calculated by counting full elapsed periods, not by dividing days by 30 or 365.
Worked example
Someone born on 1990-03-15 measured on 2026-05-26 is 36 years, 2 months and 11 days old. The calendar-month logic counts a full month each time the day-of-month equals or passes the birth day; the remaining days are counted from the most recent monthiversary.
Frequently asked questions
How is age in months calculated?
Months are counted by elapsed calendar months from birth date, not by dividing days. Someone born March 15 turns one month old on April 15 regardless of how many days are in March.
Does the calculator account for leap years?
Yes. The calculator works in calendar dates, so February 29 and leap-day birthdays are handled correctly.
Can I find the age difference between two people?
Enter the older person's birth date as the start date and the younger person's as the end date, and the calculator will return the exact difference in years, months and days.