Age Calculator – Exact Age in Years, Months & Days
Find out your exact age in years, months and days, plus the total days lived and days until your next birthday.
About Age Calculator
Our age calculator tells you exactly how old you are in years, months and days from your date of birth — the same breakdown used in official documents. It also shows your total days lived and the days remaining until your next birthday, and can calculate your age between any two dates (for example, how old you were in 2020). 100% free, private and instant.
📖 The Full Guide
How old am I in years, months and days? Learn how age is calculated, discover fun facts about the days you have lived, and get your exact age instantly.
Read the article →🎂 Age Calculator
History
How to Use
Select your date of birth.
Optionally pick a target date (defaults to today).
Click Calculate to see your exact age.
See total days lived and days to your next birthday.
Frequently Asked Questions
We compare your birth date with today's date and break the difference into full years, remaining months and remaining days — the same way age is counted in official documents.
Yes — use the optional 'age as of' field to calculate age at any past date, or use our Date Difference Calculator for any two dates.
Yes, the calculation handles leap years and months with different lengths automatically.
Multiply your age in years by 52.18 for weeks, by 365.25 × 24 for hours, and by 365.25 × 24 × 60 for minutes. Use our date difference calculator for the exact total.
Count every calendar day from your birth date to today. Our age calculator shows this exact number automatically.
The Formula
Age = today's date − date of birth, decomposed into years, months and days while respecting month lengths and leap years.