Date Difference
Calculator
Days between two dates.
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Date & Time
Age Calculator
Enter your date of birth to get your exact age in years, months and days — and a countdown to your next birthday.
Age
—
Years, months and days.
| Total months | — |
|---|---|
| Total weeks | — |
| Total days | — |
| Next birthday | — |
Show our math
Enter your figures above to see the step-by-step working.
Computed in your browser from your device dateEverything computed client-side — nothing leaves this page
How the Age Calculator Works
Your age is the time from your date of birth to today (or any date you choose). This calculator counts full years first, then the leftover months, then the leftover days — borrowing from the previous month when the day-of-month hasn’t come around yet, exactly the way people say their age. It also totals everything in months, weeks and days, and counts down to your next birthday.
Everything is worked out in your own browser using today’s date on your device, so nothing is sent anywhere. Leave the second box blank to use today, or set it to find your age on a past or future date.
age = years, then remaining months, then remaining days
Frequently Asked Questions
How is age calculated in years, months and days?
Count whole years from your birthday, then whole months, then the remaining days. If the day of the month hasn’t arrived yet, one month is borrowed and its days are added, which is why the day count is always positive.
Does it account for leap years?
Yes. Because it works with actual calendar dates, February 29 and differing month lengths are handled correctly in both the years-months-days breakdown and the total-days figure.
Can I find my age on a future or past date?
Yes — put that date in the second box. Leave it blank and the calculator uses today’s date from your device.
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