Calculate your exact age in years, months, and days from your date of birth. Also shows total days and hours lived.
Age Calculator
The Age Calculator works out your exact age from your date of birth - not just in years, but in years, months, and days - and counts down the days to your next birthday.
How your age is calculated
The tool compares your birth date with today's date and breaks the difference down the way people actually think about age: full years completed, then the remaining months, then the leftover days. It accounts for months of different lengths and for leap years, so 29 February birthdays are handled correctly.
Beyond your birthday
Because it also totals your age in months, weeks, and days, the Age Calculator is useful for tracking a baby's milestones, working out eligibility cut-offs (school, retirement, insurance), or settling the friendly argument about who is exactly how much older.
Frequently Asked Questions
Does the calculator account for leap years?
Yes. It uses real calendar dates, so leap years and months of different lengths are handled automatically for an exact result.
Can I find my age on a past or future date?
Enter your date of birth and the target date to see how old you were, or will be, on any specific day.
How is the "next birthday" countdown worked out?
It finds the next occurrence of your birth month and day after today and counts the days remaining until then.
Is my date of birth stored anywhere?
No. The calculation happens entirely in your browser and your date of birth is never uploaded or saved on a server.
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