Age Calculator
Calculate exact age in years, months, and days from a date of birth.
How this calculator works
How to use this calculator
Enter the date of birth and choose the date you want to calculate age on. By default, the calculator uses today’s date. Click Calculate Age to see the exact age and total days.
Formula used
The calculator compares the birth date and calculation date calendar fields, then adjusts for incomplete months and days. It also calculates total days by measuring the difference between the two dates.
Example calculation
If someone was born on 2000-01-15 and the calculation date is 2026-05-27, the result is 26 years, 4 months, and 12 days.
What the result means
The exact age shows completed years, months, and days. Total days and weeks are approximate calendar-based totals from the selected start and end dates.
Frequently asked questions
Can I calculate age on a future date?
Yes. Choose any calculation date after the birth date.
Does it account for leap years?
Yes. The total days calculation uses actual calendar dates.
Can I use this for anniversaries?
Yes. You can use any start date and calculation date.