Age Calculator
Enter your date of birth to find your exact age in years, months and days, total days and weeks, and how long until your next birthday.
Detailed Age Calculation
Do you want to know not just what year you are in, but exactly how many days, hours and even minutes you have been alive? Our age calculator shows your biological age in full detail based on your date of birth.
Age Tracking for Baby and Child Development
For babies in particular, knowing 'how many months old' or 'how many weeks old' is very important during their development. You can calculate this precise age data — needed for doctor check-ups and vaccination schedules — in seconds with our tool.
How Long Until Your Birthday?
See how many days and hours remain until you enter your next year of age. Build excitement with our countdown feature and start planning ahead. You can also see which day of the week you were born on the results page.
Korean Age and Age in Different Cultures
Age calculation can differ across cultures (for example, being counted as 1 year old at birth). Our tool uses the internationally standard 'attained age' system — meaning you are not counted as being a certain age until that age is fully completed.
How to Use
Inputs
The only required input is your birth date (YYYY-MM-DD). The reference date defaults to today; you can change this field to calculate against a past or future date.
Example Scenario
The age of a person born on 15 March 1990 as of 22 April 2026:
| Parameter | Value |
|---|---|
| Birth date | 15 March 1990 |
| Reference date | 22 April 2026 |
| Exact age | 36 years, 1 month, 7 days |
| Total days | 13,187 days |
| Total weeks | 1,883 weeks |
| Next birthday | 15 March 2027 (327 days) |