Exact age in years, months and days from a date of birth, with the next birthday
Runs in your browser. Nothing you type is sent anywhere. Updated on 24 Oct 2026.Age is counted in whole calendar months from the date of birth, split into years and months, with the leftover days. Someone born on 15 August 1995 is 31 years, 1 month and 23 days old on 8 October 2026, which is 11,377 days.
Pick your Date of birth in the first box.
Leave Age on set to today, or pick another date to see your age on that day, such as an exam or form deadline.
Read your age in years, months and days, with the totals in months, weeks and days below it.
See the day you were born and how many days are left to your next birthday, then press Share result to copy a link.
Forms, exams and job applications often ask for your age on a particular date, not today, and the answer has to be exact: 24 years and 11 months is not 25. This calculator gives your age in years, months and days on any date you choose, and the same span as a total in months, weeks, days and hours.
How the age is counted. The calculator counts whole calendar months from your date of birth, keeping the day of the month. When a month is shorter, the last day of that month stands in: someone born on 31 January is exactly one month old on 28 February, or 29 February in a leap year. The years are the whole months divided by twelve, and the days are what is left after the last whole month. Adding the result back to the date of birth always lands exactly on the date you measured on.
Born on 29 February. In years that are not leap years, the birthday is taken as 28 February. That is the usual reading for legal age in India, the UK and most US states, and the page states it so you can check it against the rule your form uses.
Also shown. The weekday you were born on, your next birthday with its weekday, the days left until it, and the age you will turn. On your birthday itself the page says so.
What it does not do. It works in whole days, so the time of birth and time zones are ignored; a hospital record at 11:50 pm is still that day. It does not use astrological or lunar calendars, and the Hindu, Islamic and Chinese ages that some people count differently are not calculated. Dates from the year 1000 to 9999 are accepted.
Everything runs in your browser; your date of birth is not sent anywhere.
Exact age counts whole calendar months from the date of birth to the chosen date, then divides them into years and months, and the days left over after the last whole month are the days. So 15 August 1995 to 8 October 2026 is 31 years, 1 month and 23 days.
Change the Age on box from today to the date the form names, such as the last date to apply or 1 January of the exam year. The calculator then shows your age on exactly that day in years, months and days, which is what most eligibility rules ask for.
Someone born on 29 February is treated as having the birthday on 28 February in years that are not leap years, so they turn 18 on 28 February in that year. Most legal rules in India, the UK and the US read it this way, but a particular form can state its own rule.
Months have different lengths, so calculators that treat every month as 30 days, or every year as 365.25 days, drift by a day or two. This page counts real calendar months and keeps the day of the month, so adding the answer back to the birth date lands on the measured date exactly.
No. The calculator works in whole dates, so a birth late at night still counts from that calendar day, and the reader's time zone never shifts the result. Only the date of birth and the date being measured on are used.
No. The calculation runs in your browser and the date stays on your device. A shared link carries the two dates in the address only when you press Share result yourself, so keep that link private if the date of birth is personal.
Formula only: no rates or limits are read from an official source.
Still stuck? Ask about Age Calculator and anybody who knows can answer. No account needed.
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