Age Calculator
Calculate your exact age in years, months and days from your date of birth.
Your age
36 years, 5 months, 20 days
Total days lived
13,320
Days until next birthday
194
How to use
- Enter your date of birth.
- Optionally change the 'age as of' date to calculate age on a specific day.
- See your age breakdown, total days lived, and days until your next birthday.
How it works
Age is calculated by subtracting the birth date from the reference date, accounting for leap years and varying month lengths.
Total days = number of calendar days between birth date and reference date.
Example
Born January 15, 1990, calculating age as of June 30, 2026:
36 years, 5 months, 15 days (approximately 13,310 days).
Frequently asked questions
How is age calculated?
Age is computed in full years, months, and days by comparing your birth date to a reference date, adjusting for months with different numbers of days.
Can I calculate age on a past or future date?
Yes. Change the 'age as of' field to any date. The birth date must be on or before that date.
Does this account for leap years?
Yes. February 29 birthdays and leap years are handled correctly in the day count.
Is this age calculator accurate for legal purposes?
This tool is for general use. For legal age verification, consult official documentation.
How old am I in days?
Enter your birth date to see total days lived along with years, months, and days breakdown.
How many days until my birthday?
The calculator shows days until your next birthday automatically when you enter your date of birth.