Age Calculator

Find your exact age in years, months and days.

Date of birth

Calculate age as of

How age is calculated

This tool calculates your calendar-accurate age by comparing your date of birth to a reference date (today, by default). Unlike a simple day count, it accounts for varying month lengths and leap years to give you a precise breakdown in years, months and days — plus the total number of days you've been alive.

Why calculate exact age?

Filling out official forms and applications that require exact age
Planning birthdays, anniversaries or age-restricted eligibility dates
Curiosity — finding out exactly how many days old you are
Calculating the age of a document, event, or milestone