Everything runs locally. Your date of birth is never uploaded or stored - the age is worked out right on the page in your browser, and the tool keeps working offline once loaded. Change either date and every figure updates instantly.
Free Age Calculator
Runs entirely in your browser - no upload, no sign-up.
Your dates
The second date defaults to today - change it to find the age on any date, past or future.
Exact age-Enter a date of birth
-Total months
-Total weeks
-Total days
-Total hours
-Total minutes
-Total seconds
How do you calculate age from a date of birth?
Count the full years since the birth date, then the full months since the last birthday, then the leftover days. This calculator does that instantly: enter a date of birth and it shows the exact age in years, months and days, plus totals in weeks, days, hours, minutes and seconds.
How to use
- 1Enter the date of birth. Pick or type the date of birth in the first field.
- 2Choose the second date (optional). The second field is set to today, so you get the current age. Change it to find the age on any other date - past or future.
- 3Read the results. The exact age appears as years, months and days, with totals in months, weeks, days, hours, minutes and seconds, plus the next birthday and the weekday of birth. Use Copy results to grab everything.
Who it's for
- Filling in forms that ask for an exact age in years, months and days - visa applications, school enrolments, insurance and medical paperwork.
- Parents tracking a baby's or child's age in weeks and months for check-ups, milestones and daycare cut-off dates.
- HR and admin staff checking someone's age on a specific date, such as a contract start, an eligibility deadline or a retirement date.
- Birthday planners finding out how many days until the next birthday and which weekday it lands on.
- Anyone curious how many days, hours or even seconds they have been alive.
FAQ
Is my date of birth uploaded anywhere?
No. The whole calculation runs in your browser - nothing is sent to a server, stored or shared. You can even load the page, disconnect from the internet, and it still works.
Is the age calculator free?
Yes - completely free, with no sign-up, no download and no limits on how many dates you check.
How is age calculated exactly?
The tool counts full years up to the last birthday, then full months, then the remaining days. Totals in weeks, days, hours, minutes and seconds come from the exact number of days between the two dates, so leap years are fully accounted for.
Can I find my age on a past or future date?
Yes. The second field is set to today by default, but you can change it to any date - see how old someone was on a historic date, or how old you will be on a coming deadline.
What about a February 29 birthday?
Leap-day birthdays are handled: the age still increases once a year. In common years the tool counts the next birthday from March 1 - the first day the person is a full year older - and the page notes this so the result is never a surprise.
Why does my result differ from another age calculator by a day or two?
Month lengths differ, so calculators disagree on the months-and-days part when a birth date falls late in a month. The years are always the same, and the total-days figure is exact everywhere - only the split between months and days can vary by convention.
Does it tell me when my next birthday is?
Yes. The tool shows how many days remain until the next birthday, the date and weekday it falls on, and the age you turn - handy for planning ahead.