🎂 Age Calculator
Find your exact age in years, months & days — with live seconds counter, zodiac sign, birthday countdown, and life milestones.
Enter your date of birth above to calculate your exact age
More Than Just an Age Calculator
Enter your date of birth and get a complete picture — from your exact age to your zodiac sign, birthday countdown, and every life milestone.
Exact Age — Years, Months & Days
Get your precise age down to the day, correctly accounting for all month lengths and leap years. Not just "25 years" — but "25 years, 3 months, 12 days."
Live Seconds Counter
Watch your age tick up in real time. The total seconds counter updates every second — seeing over 800 million seconds of your life flash by is oddly mesmerizing.
Birthday Countdown
See exactly how many days, hours, minutes, and seconds until your next birthday, along with the day of the week it falls on.
Zodiac Sign Calculator
Instantly find your Western zodiac (sun) sign and your Chinese zodiac animal year — both derived from your date of birth.
Life Milestones
See the exact calendar date you turned (or will turn) every major age from 1 to 100 — complete with days ago or days remaining.
Age on Any Date
Calculate your age as of a specific past or future date — perfect for legal age checks, anniversary calculations, or planning ahead.
Age Difference Mode
Enter any two dates and calculate the exact difference in years, months, days, weeks, and total days. Useful for age gaps, event durations, or checking time elapsed.
Birth Facts
Discover your birthstone, birth flower, and the exact day of the week you were born — all from a single date of birth.
100% Private
All calculations happen in your browser. Your date of birth is never sent to any server. No account, no login, no data collection.
How to Calculate Your Age
Enter your date of birth
Click the date field and type or pick your birth date. The calculator starts instantly — no button to press.
See your exact age
Your age in years, months, and days appears immediately, updating live every second.
Explore the details
Scroll down to see your age in all units, birthday countdown, zodiac sign, birthstone, and life milestones.
Try the date difference mode
Switch to 'Age Between Two Dates' to calculate the exact gap between any two calendar dates.
Who Uses This Age Calculator?
Students & Job Seekers
Quickly verify age eligibility for exams, scholarships, or job applications that have minimum or maximum age requirements — with exact years, months, and days.
Parents & Families
Track a child's exact age for school admissions, vaccination schedules, or developmental milestones. Find out exactly how old your child is to the day.
HR & Legal Professionals
Calculate an employee's or applicant's precise age as of a specific date for compliance, retirement eligibility, or insurance purposes.
Curious About Your Age
Ever wondered how many seconds you've been alive? Or what your Chinese zodiac animal is? Or what day of the week you were born? Now you know.
Birthday Planning
Count down the days, hours, and seconds until your next birthday (or a friend's). Find out what day of the week the birthday falls on this year.
History & Research
Calculate the age of a historical figure at a specific event, or find the exact number of days between two historical dates using the date difference mode.
Frequently Asked Questions
How is age calculated exactly?
Age is calculated by subtracting the date of birth from today, accounting for varying month lengths and leap years. The result is expressed in complete years, remaining months, and remaining days.
How many days old am I?
Enter your DOB and check the 'Age in All Units' section. A 25-year-old is roughly 9,131 days old. The calculator also shows total weeks, hours, minutes, and a live seconds counter.
How many days until my birthday?
After entering your date of birth, the 'Next Birthday Countdown' shows a live countdown in days, hours, minutes, and seconds — plus the day of the week it falls on.
How do I calculate age between two dates?
Switch to the 'Age Between Two Dates' tab, enter any start and end date, and instantly get the difference in years, months, days, weeks, and total days.
What is my zodiac sign by date of birth?
Enter your DOB and the 'Birth Facts' section shows your Western zodiac sign. There are 12 signs based on your birth month and day, from Aries (Mar 21) to Pisces (Feb 19).
What is my Chinese zodiac animal?
The Chinese zodiac follows a 12-year cycle (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig). Your birth year determines your animal.
Can I calculate my age on a specific future date?
Yes. Fill in the 'Age as of' field with any future or past date to calculate exactly how old you will be (or were) on that day.
Is this calculator accurate for leap year birthdays?
Yes. For people born on February 29, the calculator correctly handles non-leap years and provides accurate countdown and milestone dates.
What life milestones does it show?
The milestones table shows the exact date you turn (or turned) ages 1, 5, 10, 13, 16, 18, 21, 25, 30, 40, 50, 60, 65, 70, 75, and 100 — with days ago or days remaining.
Does this work on mobile?
Yes. Fully responsive on all modern mobile browsers — Chrome, Safari, Firefox on Android and iPhone. All features including the live countdown work on mobile.
Is this age calculator free? Do I need an account?
100% free, no account needed. Just enter your date of birth and all features are immediately available — no sign-up, no login, no subscription.
Is my date of birth data private?
Completely private. All calculations happen instantly in your browser. Your date of birth is never sent to any server. No data is collected or stored on our end.