Age Calculator
Find out exactly how old you are from your date of birth, in years, months, and ...Find out exactly how old you are from your date of birth, in years, months, and days, with total days, weeks, months, and hours lived and a countdown ...
Updated
Leave blank to use today's date.
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Enter your date of birth to see your exact age in years, months, and days.
Quick answer
An age calculator works out exactly how old someone is from their date of birth, in years, months, and days. This tool runs entirely in your browser: type a birth date and it counts the precise time up to today, or to any other date you pick, correctly handling leap years and the different lengths of each month. For example, a person born on June 15, 1990 is 36 years, 1 month, and 7 days old on July 22, 2026, which is over 13,000 days lived.
Calculator Features
Why Use Age Calculator?
Exact Age to the Day
Get your precise age broken down into years, months, and days. The calculation counts real calendar days, so leap years and months with 28, 29, 30, or 31 days are all handled correctly.
Everything You Have Lived
See your total days, weeks, months, and hours lived at a glance, useful for milestones like your 10,000th day or a round birthday number.
Next Birthday Countdown
Find out exactly how many days remain until your next birthday and the age you will turn, so you never lose track of the celebration.
Age on Any Date
Leave the second field blank to measure your age today, or set an Age at date to work out how old you were, or will be, on any specific day.
100% Private
Every calculation runs in your browser. Your date of birth is never uploaded or sent to a server, and the tool keeps working offline once loaded.
Birth Facts
Alongside your age, discover the day of the week you were born plus your Western zodiac sign, Chinese zodiac animal, birthstone, birth flower, and birth season.
Common Uses for the Age Calculator
Forms and Documents
Get your exact age for official forms, applications, and legal paperwork.
School Enrollment
Check age for school admission and grade placement cut-off dates.
Health and Insurance
Work out age brackets for health cover, screenings, and eligibility.
Retirement Planning
Count the years and days to a retirement or pension milestone.
How It Works
Enter Your Date of Birth
Pick your birth date with the date field. The result appears the instant a valid date is entered.
Read Your Exact Age
See your age in years, months, and days, plus total days, weeks, months, and hours lived and your next birthday countdown.
Optional: Choose Another Date
Set an Age at date to calculate your age, or the gap between any two dates, on a day other than today.
Tips and Information
Age Between Two Dates
Set both a date of birth and an Age at date to measure the exact time between any two calendar dates, not just up to today.
Great for Forms
Use the years, months, and days breakdown when a form asks for exact age rather than just the year.
Leap Day Birthdays
Born on February 29? In non-leap years the tool treats February 28 as your birthday for the countdown, so the numbers stay consistent.