Age Calculator
Exact age, down to the day.
Why "exact" matters
Dividing days by 365.25 gives an approximate age that drifts from the calendar truth — and for the cases where age is checked (visa applications, insurance, school enrollment, tournaments), only the exact years-months-days count is accepted. This tool does calendar arithmetic the way a person would: full years first, then months, then remaining days, correctly handling month lengths and leap years.
The totals are useful outside paperwork too: total days lived gives perspective, total weeks is the productivity-framework favorite ("4,000 weeks" is roughly a lifetime), and the next-birthday countdown settles the annual "how long until I can book the venue" question.
FAQ
How are months counted?
Calendar months: from Jan 15 to Feb 15 is exactly 1 month regardless of whether February has 28 or 29 days. Remaining days are counted within the final partial month.
Can I calculate age at a past or future date?
Yes — the second field defaults to today but accepts any date, past or future (handy for "how old will I be at retirement in 2041").