Calculate exact age in years, months and days with live totals, age on any past or future date, next birthday countdown, Hijri (lunar) age, 10,000-day milestones and age difference between two people.
Enter a birth date (and optional time) to see your exact age, live totals down to the second, and the weekday of your next six birthdays. Check your age on any date, find milestones such as 10,000 days or 1 billion seconds, and compare ages between two people.
Enter a birth date and this calculator returns your precise age in years, months, and days, plus totals in weeks, days, hours, and minutes. It handles leap years and month-length differences correctly, so the result is accurate rather than a rough estimate.
Features
Exact age in years, months and days, with live seconds
Age on any chosen date (past or future)
Next birthday countdown and weekday for 6 years
Feb 29 birthdays: Feb 28 or Mar 1 rule
Hijri birth date and lunar age
Life milestones: 10,000 days, 1 billion seconds, 500 months
Age difference between two people
Star sign, Chinese zodiac, birthstone, generation, planet ages
How to use Age Calculator
1
Enter your birth date
Add the time too for hour-and-minute precision.
2
Choose the 'age on' date
Leave it on today for a live count or pick any date, e.g. an exam cut-off.
3
Explore the details
See milestones, upcoming birthdays, Hijri age and fun facts.
4
Compare two people
Switch to Age difference to see who is older and by how much.
Common use cases
Finding out exactly how old you or someone else is today
Counting down the days to your next birthday
Working out an age gap between two people
Checking age eligibility for jobs, benefits, or documents
Discovering which weekday you were born on
Measuring how long ago a past date was in days or weeks
Detailed guide
More than birthdays
Use it to work out age gaps, eligibility dates, anniversaries, project durations, or how long until an upcoming milestone. Everything runs locally in your browser, so the dates you enter never leave your device, handy for anything sensitive.
Frequently asked questions
How do I calculate my age on a specific date?
Set the 'Age on' field to that date. This is useful for school admission, visa or exam age limits, which are often measured on a fixed cut-off date.
How is age calculated for someone born on 29 February?
In common years the birthday is treated as 28 February by default. You can switch to 1 March, which some countries use for legal age.
What is my Hijri age?
Your age counted in Islamic lunar years, which are about 11 days shorter than solar years, so your Hijri age is usually higher.
When will I be 10,000 days old?
About 27 years and 4 months after birth. The milestones list shows the exact date along with 1 billion seconds and other round numbers.
How do I calculate my exact age in days?
Enter your date of birth and the calculator computes the total number of days you've been alive, updating in real-time. It accounts for leap years for accurate results.
How do I calculate the age difference between two people?
Enter both birthdates and the tool calculates the exact age difference in years, months, and days. Useful for determining age gaps in relationships, partnerships, or comparisons.
How many days until my birthday?
Enter your date of birth and the tool shows exactly how many days remain until your next birthday, including a countdown timer.
How do I find my Western zodiac sign?
Your zodiac sign is based on your birth month and day: Aries (Mar 21-Apr 19), Taurus (Apr 20-May 20), Gemini (May 21-Jun 20), Cancer (Jun 21-Jul 22), Leo (Jul 23-Aug 22), Virgo (Aug 23-Sep 22), Libra (Sep 23-Oct 22), Scorpio (Oct 23-Nov 21), Sagittarius (Nov 22-Dec 21), Capricorn (Dec 22-Jan 19), Aquarius (Jan 20-Feb 18), Pisces (Feb 19-Mar 20).
How accurate is the age calculator?
The calculator is accurate to the second, it uses your device's real-time clock and accounts for all leap years in your lifetime. The result matches what legal documents would show.
How do I calculate my age in weeks?
The tool shows your total age in days. To convert to weeks, divide that number by 7. For example, if you're 10,220 days old, you are approximately 1,460 weeks old. The calculator also displays this breakdown automatically.
How old am I in days, weeks and months?
Enter your date of birth and the calculator shows your exact age as years, months and days, plus the totals in months, weeks, days, hours and even seconds. It uses real calendar lengths and handles leap years, so the figures are exact.
How many days until my next birthday?
Along with your current age, the tool counts down the days remaining until your next birthday, so you can see exactly how long you have to wait.
Can I calculate the age or difference between two specific dates?
Yes. Change the 'as of' date to any date to find your age on that day, or to measure the gap between any two dates in years, months and days.
How do I calculate the difference between two dates?
Enter both dates and the calculator shows the precise gap in years, months, and days.
How accurate is it?
It's exact to the second, accounting for leap years, so the breakdown is precise rather than approximate.
