Exact age in years, months and days — plus totals in weeks, days and hours, and a countdown to the next birthday. Works for any date, past or future.
Enter a date of birth to see the exact age.
By calendar arithmetic, not by dividing days by 365.25. It counts the whole months that have actually elapsed since the date of birth, then the leftover days from that point — so the years and months match how ages are stated legally and in everyday use.
Yes. Change the "Age at date" field to any date — useful for eligibility cut-offs, school enrolment dates or working out how old someone was at a past event.
In non-leap years the next birthday is shown as 1 March, which is how most jurisdictions and people treat it. The exact age in years is still correct.
No. The calculation is plain JavaScript running in your browser — nothing is uploaded, stored or logged.