Work out your exact age from a date of birth in years, months, days, hours and total days, plus the countdown to your next birthday.
The Age Calculator works out an exact age in years, months, days, hours and total elapsed days from a date of birth, handling leap years correctly the same way official forms and registries do. Enter a birth date and it instantly breaks the result down into full years plus the remaining months and days, rather than giving a rounded estimate.
Beyond calculating current age, the target date can be changed to any point in the past or future, so you can find out how old someone was on a specific historical date, or how old they will be on a future one. A countdown to the next birthday is also shown, useful for planning celebrations or eligibility deadlines that depend on reaching a particular age.
Results are shown as full years, remaining months and remaining days rather than a single rounded number, matching the precision required on official documents and eligibility forms.
Changing the target date away from today lets you determine someone's exact age on a historical event date or a future qualifying date, not just their current age.
Calculations correctly account for leap years and varying month lengths, avoiding the small errors that come from simple date-subtraction formulas in a spreadsheet.
Full years between the two dates are counted first, then the remaining months, then the remaining days — the same method used on birth certificates and official identification. This avoids the rounding errors that come from simply dividing the number of days by 365.
Alongside the years/months/days breakdown, the calculator shows a running total of days and hours between the two dates, which is a common curiosity for milestone birthdays such as reaching 10,000 or 20,000 days old.
Because February has 29 days in leap years, calculations that ignore this can be off by a day for people born in or spanning leap years. This tool accounts for the actual calendar, so the years/months/days figures remain accurate regardless of how many leap years fall within the range.
Full years are counted first, then the remaining months and days, with leap years handled correctly — the same method used on official forms.
Yes. Change the target date from today to any date to find how old someone was, or will be, at that moment.
Yes. Age Calculator on Klipza is completely free with no account, no subscription and no watermark on your files, and there is no daily usage limit.
Processing happens locally in your browser wherever technically possible, so your files are not uploaded to a server, stored or shared with third parties.
Yes. It is fully responsive and runs in any modern browser on Android, iPhone, iPad, Windows and macOS — nothing to install.