Everyday
Age Calculator
Calculate your exact age in years, months, and days from your birth date, plus total days lived and days until your next birthday.
How age is calculated
This tool counts full calendar years, months, and days between your date of birth and today (or any date you choose). It accounts for varying month lengths and leap years, so the result matches how age is counted on official documents.
Frequently asked questions
Why doesn’t my age in days equal years × 365? Leap years add an extra day roughly every four years, so total days lived is always slightly more than years × 365.
Can I calculate age as of a past or future date? Yes — set “Age as of” to any date to see the age at that point in time.