Calculate exact age in years, months and days from a date of birth — today or on any date you choose, such as an application deadline. Also shows totals in months, weeks and days and the countdown to the next birthday.
How to use
- Enter the date of birth.
- Keep today's date or change the “Age on” date.
- Read the exact age and totals.
Example
Someone born on 15 August 2000 is 26 years, 1 month and 14 days old on 29 September 2026.
How exact age is calculated
ZIYNU uses calendar arithmetic instead of dividing days by 365: it counts full years first, then full months, then remaining days, borrowing the correct number of days from the previous month when needed. That's why results match what a school or passport office would calculate.
People born on 29 February have their birthday counted on 28 February in non-leap years.