Is the day-of-week-born accurate?

Yes — the calendar math is correct back to 1582 (the start of the modern Gregorian calendar). Cross-check against any historical day-of-week chart and you'll see they match.

My birthday is Feb 29 — what about non-leap years?

Browsers handle this by rolling forward to March 1 for the "this year" comparison. Most legal systems define the leap-year birthday as occurring on Feb 28 in non-leap years; the calculator follows that for "next birthday" countdown.

Age Calculator

Exact age in years, months, days, hours, and minutes — plus countdown to next birthday.

Result

Your age

35 y · 10 mo · 19 d

Born Friday, Fri, 15 Jun 1990

In total years35
In total months430
In total weeks1,872
In total days13,107
In total hours314,573
In total minutes18,874,411
Next birthday42 days to goMon, 15 Jun 2026
Day of week bornFridayNote

How to use this calculator

Pick the year, month, and day you were born.
Result updates to the current moment — refresh the page for an updated minute count.
Day-of-week-born is calculated by the calendar, not approximated.
Future dates are not allowed — the calculator returns "—" if you enter one.

About this tool

Most "age calculators" stop at "you're 34 years old." The actual decomposition into years + months + days matters for forms (visa applications, insurance), milestones (a baby's first 18 months are usually tracked in days then weeks), and for the small joy of knowing exactly how many minutes you've been alive. The math has one trick: months don't have a fixed number of days. To handle this correctly we walk the calendar month by month rather than dividing by 30.44. The day-of-week-born is calculated using Zeller's congruence, the same formula used since the 1880s.

Frequently asked

Years × 365 ignores leap years. The total-days count uses the actual number of milliseconds since birth divided by milliseconds per day, so leap years are automatically counted.