Age Calculator
Find your exact age in years, months and days — plus total days, weeks and hours, a next-birthday countdown, the weekday you were born, zodiac signs and life milestones.
- Your data never leaves your device
- 100% free
- No sign-up
- Works offline after first load
How to calculate your age
- Enter your date of birth (and another date if you want your age on that day).
- See your exact age, totals in months, weeks, days and hours, and your next birthday.
- Switch to “Age difference” to compare two people.
About Age Calculator
Know your exact age down to the day — or on any date you need, such as the cut-off date of an exam or job application. You also get your age in total months, weeks, days, hours, minutes and seconds.
See how many days until your next birthday and which weekday it falls on, the day of the week you were born, your zodiac and Chinese zodiac signs and birthstone, and fun milestones like your 10,000th day. Compare two dates of birth with the age-difference mode.
Good for
- Exam and job application age limits
- Birthday countdowns and fun facts
- Age gaps between siblings, partners or friends
Tip: Set “Age on” to the application cut-off date to check age limits.
Frequently asked questions
How is exact age calculated?
Whole years are counted first, then whole months, then the remaining days — borrowing the days of the previous month when needed, the same way people count birthdays.
Can I find my age on a past or future date?
Yes — change “Age on” to any date, for example the closing date of an exam or job application.
What if I was born on 29 February?
Your birthday falls on 29 February in leap years; the countdown shows the next 29 February.
Can I compare the ages of two people?
Yes, “Age difference” shows the gap in years, months and days, and in total days and weeks.
Can I save or share a calculation?
Yes — click Share to copy a link that opens the calculator with your numbers, Print / PDF to save the results, or open History to go back to recent calculations.
Is my data stored or sent anywhere?
No. Everything is calculated in your browser. Your recent calculations are kept only in this browser (History), and a shared link contains just the numbers you entered.