Age Calculator
Enter any date of birth to get the exact age in years, months and days — plus total days lived and your next birthday countdown.
Knowing your exact age matters for school admissions, job applications, retirement planning and official forms that ask for age in years, months and days. This free age calculator takes any date of birth and works out the precise age on today's date, along with the total number of days lived and how many days remain until the next birthday.
Pick your date of birth above, then press Calculate Age.
How to use the Age Calculator
- Pick the date of birth using the date field above — you can also type it directly.
- Click Calculate Age to see the exact age in years, months and days, plus total days lived.
- Use Clear to reset and calculate the age for a different date whenever you need.
Age Calculator — FAQs
Is this age calculator free?
Yes, completely free with no signup and no usage limits. Calculate the exact age for any date of birth as often as you like, and everything runs privately in your own browser without sending your dates anywhere.
How is the exact age in months and days worked out?
The calculator subtracts the birth date from today's date, borrowing days from the previous month and months from the previous year where needed. This matches how official documents count age, including correct handling of leap years and months of different lengths.
Does it account for leap years?
Yes. Because the calculation uses real calendar dates rather than multiplying by 365, leap years and the different lengths of months are handled automatically. The total-days-lived figure is exact for any valid date of birth.
Can I calculate the age on a past or future date?
This tool always calculates the age as of today. If you need the age on a different reference date, note the result down and adjust by the difference, or simply come back and calculate again on the date you need.