Age Calculator
Find your exact age in years, months, and days. Get total days lived, next birthday countdown, and more.
Defaults to today. Change to calculate age on a specific date.
Exact Precision
Get age down to the exact year, month, and day — no rounding.
Birthday Countdown
Know exactly how many days until your next birthday celebration.
Custom Date
Calculate age as of any date — useful for forms and eligibility checks.
Age Calculator Guide
What this calculator does
The age calculator determines exact age in years, months, and days from date of birth. It also calculates total months lived, total days lived, and estimated days left to the next birthday. This helps with document checks, form eligibility, school admissions, and milestone tracking with higher precision than simple year-only methods.
How to use it
Enter date of birth and optionally select an “As Of” date if you need historical or future reference checks. If no custom date is selected, current date is used automatically. Click calculate to view full breakdown cards and badge output. The recent activity panel stores quick local history so repeated verification is easier.
Example usage
Suppose date of birth is 10 June 2000 and “As Of” date is 1 January 2026. The calculator shows exact age components for that date, plus cumulative months and days lived. This is useful when a recruitment form asks whether a candidate is within a strict age range on a specific cut-off date.