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Age Calculator — How Old Am I Today?

Work out your exact age today in years, months and days — plus the day of the week you were born, a countdown to your next birthday, and your age in weeks, days and hours.

Runs entirely in your browser — nothing you enter is uploaded or stored.

Age as of

Pick your date of birth to see your exact age, the weekday you were born, and a countdown to your next birthday.

What this age calculator tells you

Enter your date of birth and you get your exact chronological age — the kind official forms mean when they ask how old you are — expressed in years, months and days. Around it, the calculator shows the day of the week you were born, how many days remain until your next birthday and the age you will turn, and your age converted into weeks, days, hours and minutes.

You can also move the “as of” date away from today. That answers questions like “how old will I be on 1 June 2027?” or “how old was I on the exam cut-off date?” — the same calculation, anchored to the date you choose instead of the current one.

How exact age is calculated

Age is a calendar measurement, not a division. The calculator counts the number of complete years since your birth date first — your age ticks over on each birthday, not after every 365.25 days. It then counts the complete months since your most recent birthday, and finally the days left over. When the day of the month has to be borrowed (say you were born on the 31st and the current month is shorter), it borrows the real length of the month immediately before the “as of” date — so a leap-year February counts as 29 days and a July as 31.

A worked example: someone born on 15 August 1995 is, on 11 September 2026, exactly 31 years, 0 months and 27 days old — 31 full years to 15 August 2026, then 27 days to 11 September. In total that is 11,350 days, or about 272,400 hours. The totals count whole calendar days from midnight of the birth date, since a birth certificate rarely records the minute.

The day of the week you were born

Every date maps to exactly one weekday, so your birth date fixes it permanently — the calculator reads it straight off the calendar for your date of birth. Weekdays repeat on a 28-year cycle for most spans (leap-year alignment permitting), which is why your birthday falls on your birth weekday only every few years.

Milestones worth watching

The week, day and hour figures are more than trivia: they put round- number milestones on your calendar. Your 10,000th day arrives at about 27 years and 4½ months; your 20,000th at about 54 years and 9 months; your 1,000th week at about 19 years and 2 months. Set the “as of” date into the future to find the exact date any of these fall on.

Frequently asked questions

How is my exact age calculated?
The calculator counts real calendar units, not averages: first the number of complete years since your date of birth, then the complete months on top of that, then the leftover days. So someone born on 15 March 2000 is exactly 26 years, 5 months and 27 days old on 11 September 2026. It never divides by 365 or assumes 30-day months, which is why the answer matches how ages are counted on official documents.
Why do different age calculators give slightly different answers?
The years figure always agrees; small differences appear in the days figure because months have different lengths. When the day-of-month of the current date is earlier than your birth day-of-month, a calculator has to borrow days from a month — this tool borrows from the month immediately before the current date, which is the most common convention. Differences are at most a day or two and only in the days column.
I was born on 29 February. How is my age handled?
Your age in years increases when the calendar reaches your birthday. In leap years that is 29 February; in common years this calculator treats 1 March as the day your age ticks over, which is the convention most countries use. The next-birthday countdown points to 29 February when the coming year is a leap year, otherwise to 1 March.
Can I find my age on a date other than today?
Yes — switch "as of" from today to any date to get your exact age on that date, past or future. This is handy for forms that ask your age on a cut-off date, like exam or job applications.
Is my date of birth stored or sent anywhere?
No. The calculation runs entirely in your browser on your device. Nothing is uploaded, nothing is stored, and the page works offline once loaded.