Age Calculator: Find Your Exact Age in Years, Months and Days
Find your exact age in years, months, days, hours and minutes, or your age on any date. Free and private, in your browser.
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Age Calculator by Date of Birth
Enter your date of birth and get your exact age in years, months and days. Type the date or pick it from the calendar.
No registration required
Secure & private
Works on any device
Type date of birth
or
Birth time (optional)
0Years
0Months
0Days
0Hours
0Minutes
Total months
Total weeks
Total days
Total hours
Born on a
Next birthday
100% Private
Your dates are calculated in your browser — nothing is sent anywhere.
Instant
Results appear the moment you press Calculate.
Free & Unlimited
No account and no limits on how often you use it.
How to calculate your age
Three quick steps. Nothing to install and nothing leaves your device.
1
Enter your birth date
Type the day, month and year in that order, or pick the date from the calendar. Add your birth time (hour, minute, AM or PM) if you know it.
2
Choose the end date
Leave it on today with "Till now", or pick any other date to find the age on that day, past or future.
3
Calculate
Press Calculate Age to see years, months and days, plus total months, weeks, days and hours, the weekday you were born and your next birthday.
Find your age from your date of birth
Type the day, month and year into the three boxes, or pick the date from the calendar. The two stay in sync, and the cursor moves to the next box by itself.
- Dates from 1 January 1900 are accepted. A date of birth cannot be in the future.
- Leap years and months of different lengths are handled, because the tool counts real calendar dates.
- Your date of birth stays on your device. The calculation runs in your browser.
More age calculator options
Why calculate your exact age?
Forms, school and job applications, insurance, visas, sports categories and legal limits often ask for your age on a particular date, not just your age today. Counting the years, months and days by hand is easy to get wrong, especially across leap years and months of different lengths. This calculator does it from real calendar dates.
The calculation runs in your browser. Your date of birth is not sent to a server.
How this calculator works
- Enter the date your way. Type the day, month and year (the cursor moves on by itself), or use the calendar. The two stay in sync. The calendar does not allow a future date and starts in 1900.
- The age is counted in whole calendar units. The result shows full years, then the months left over, then the days left over, using the real length of each month.
- You can pick the end date. The default is today. Choose any other date to find the age on that day, or press Till now to return to today.
- Birth time is optional. Add an hour and minute to also see hours and minutes. If you give only one of them, the other is set to zero minutes or 12 o'clock, so give both for a reliable result.
- Totals are shown too. You also get total months, total weeks, total days and total hours, the day of the week you were born on, and how many days are left until your next birthday.
- Everything uses your device's date and time. Today and the current time come from your own device.
Limits to know
- Dates run from 1900. Birth dates before 1 January 1900 are not accepted.
- The dates must be in order. The end date cannot be before the birth date, and a birth date cannot be later than today when you calculate until today. You will see a message if so.
- Hours and minutes depend on the end date. With "Till now" and a birth time, the result uses the exact current time. With any other end date, that day is counted from the start of the day (midnight).
- Time zones are not converted. If you were born in a different time zone, the hours and minutes can differ slightly.
- Next birthday counts from the end date. If you choose a custom end date, the number of days left is worked out from that date, not from today.
- 29 February births. In years without a 29 February, the next-birthday count uses 1 March.
Tips and uses
- Find your age on a future date. Set "Calculate age until" to the day you turn a milestone age, or to a deadline for a form.
- Find the age difference between two people. Enter the older person's birth date as the date of birth and the younger person's birth date as the end date. The result is the gap between them.
- Check how many days old you are. The total days and total hours boxes give you a number to share or compare.
- Reading the weekday. "Born on a" tells you which day of the week you were born, which is a fun fact for birthday cards.
- More calculators. Try the BMI Calculator, or see what a photo suggests with the Face Age Estimator (its results are only approximate).
Learn about Age
Helpful guides about age calculation, dates and calendars.
Frequently asked questions
Quick answers about the ConvertKit Lite Age Calculator.
Is my date of birth stored or sent anywhere?
No. The calculation runs entirely in your browser, so your date of birth is not uploaded to a server.
Do I have to enter my birth time?
No, it is optional. Add it if you want your age in hours and minutes as well.
Can I find my age on a past or future date?
Yes. Change the "Calculate age until" date to any day after your birth date.
How are leap years handled?
The calculator uses real calendar dates, so leap years and different month lengths are taken into account.
Why does the time zone matter?
Results use your device's local date and time. If you were born in another time zone, hours and minutes may differ slightly.
In what order do I type the date?
Day, then month, then year (DD, MM, YYYY), using four digits for the year. The cursor jumps to the next box when a box is full. You can also pick the date from the calendar instead.
What is the earliest birth date I can use?
1 January 1900. The calendar also stops at today, because a birth date cannot be in the future.
How are the years, months and days worked out?
The calculator counts full years first, then full months, then the remaining days, using the actual number of days in each month. It works from real calendar dates, not an average year.
What do the total months, weeks, days and hours mean?
They are your whole age expressed in one unit. Total months is your full years times twelve plus the extra months. Total weeks and total days are whole numbers. Total hours is the number of whole hours between the two moments.
Why can I not see hours and minutes?
They only appear when you enter a birth time. Choose an hour and minute, with AM or PM, and calculate again.
What if I enter only the hour or only the minute?
The missing part is filled in for you: a missing minute becomes 0, and a missing hour becomes 12. To avoid surprises, give both.
Can I find the age on a future date?
Yes. Set the "Calculate age until" date to any day after your birth date, including one in the future, for example the day you turn 18 or 65.
How do I find the age difference between two people?
Enter the older person's birth date as the date of birth, then pick the younger person's birth date as the "Calculate age until" date. The years, months and days shown are the gap between them.
How is my next birthday counted?
It is the number of days from the end date to the next time your birth month and day come round. It shows "Today!" if the end date is your birthday. With a custom end date, the count starts from that date.
What happens if I was born on 29 February?
The calculator counts your age by real dates. For the next-birthday count in a year without a 29 February, it uses 1 March.
Does the calculator use my time zone?
It uses your device's local date and time. People born in another time zone may see a small difference in hours and minutes.
Can I type my date of birth instead of using the calendar?
Yes. Type the day, month and year into the three boxes. You can also pick the date from the calendar, and the boxes update to match.
Does it work for people born before the year 2000?
Yes. Any birth date from 1 January 1900 up to today works.