Calculate your exact age in years, months & days, or find the age gap between two people.
Enter your date of birth (DOB) in the Age Calculator mode. The tool automatically calculates your age as of today. You can also pick a custom "Age as on" date to find your age on any past or future date.
For comparing ages, switch to Age Difference mode and enter two dates. The tool will show the exact gap in years, months, and days, and clearly state which date is older.
Age is calculated by subtracting the birth date from the current (or target) date. The math accounts for the varying lengths of months and leap years, so you always get an accurate result. For example, if you were born on 15 August 1995 and today is 1 August 2026, your age is 30 years, 11 months, and 17 days.
The calculator also shows your age in total months, weeks, days, and hours, perfect for those who need granular detail.
Whether you're comparing ages for siblings, colleagues, family members, or general curiosity, the Age Difference mode gives you a clear, neutral answer. Enter two dates and the tool tells you exactly how much older one is than the other, in years, months, and days.
No opinion or "acceptable age gap" verdict: just the facts, clearly stated.
This age calculator online is a free date of birth calculator that turns any DOB into an exact age in seconds. There is no signup, no app download and no paywall, it is a completely free online age calculator that works on mobile and desktop browsers alike. Because all the date maths runs inside your browser, your date of birth is never uploaded or stored anywhere.
Most people searching for a date of birth calculator want one of three things: their current age today, their age on a specific past or future date, or the gap between two dates. This single page handles all three, so you do not need a separate DOB to age calculator, a current age calculator and an age difference tool.
To use this age calculator by date of birth, type your DOB as DD/MM/YYYY or tap the calendar icon to pick it. The answer appears instantly. If you have ever wondered how to calculate my age by hand, the method is simple:
That last step is where manual calculation usually goes wrong, because months have 28, 29, 30 or 31 days and leap years shift February. The my current age calculator mode above handles all of that automatically, which is why the result differs from a rough "age calculator by year" estimate that only subtracts years.
The age calculator formula used here is a calendar-aware date difference rather than a simple division:
Years = target year − birth year, minus 1 if the birthday has not occurred yet this
year.
Months = months elapsed since the last birthday.
Days = days elapsed since the last month-anniversary of the birth date.
A common shortcut you will see online is "age in days ÷ 365". That is close but wrong, it drifts by about one day for every four years because it ignores leap days. Over a 40-year lifespan the error is roughly ten days. This tool counts real calendar days instead, so age calculator in days and age calculator in years always agree with each other.
The age difference calculator mode compares two dates and reports the exact gap. It is useful as an age difference calculator between two people, siblings, classmates, colleagues, parents and children, and equally as an age difference calculator between two dates when you simply need the span between any two calendar dates.
Results are shown as an age difference calculator in years, an age difference calculator in months and an age difference calculator in days at the same time, so you can quote whichever unit suits you. The tool also states plainly which of the two dates is older.
People often use a couple age difference calculator or an age difference calculator for marriage to check a gap before a biodata or a registration form. This tool gives you the number and nothing more, it does not judge whether a gap is "acceptable" or "appropriate", because that is a personal matter, not a calculation.
Alongside your age, the calculator shows a next birthday countdown telling you exactly how many days remain until your birthday comes round again. If you were born on 29 February, the countdown treats 1 March as your birthday in non-leap years, which is the convention most Indian institutions and government forms follow.
A lot of people look for a date of birth calculator in Excel because that is what they
have at work. Excel can do it with DATEDIF, but you have to remember three separate
formulas and format the cells as dates first. If you only need the answer once, typing the DOB above is
faster. If you need it for a whole column of names, Excel is the better choice: the FAQ below gives
the exact formulas.
Age is calculated by subtracting the birth date from the current (or target) date. The result is expressed in years, months, and days. Our calculator handles leap years and varying month lengths automatically.
Enter your date of birth in the Calculator mode and choose an 'as on' date (defaults to today). The tool will instantly show your age in years, months, days, total months, weeks, days, and hours.
Switch to the 'Age Difference' mode and enter the dates of birth for both people. The calculator will show the exact difference in years, months, and days, and clearly state who is older.
Yes. The Age Calculator displays your age in multiple formats: years/months/days, total months, total weeks, total days, and total hours: all at once.
Yes. The calculator handles leap years correctly. For birthdays on February 29 in non-leap years, the birthday is treated as March 1 for countdown purposes, as per standard convention.
In Excel, use =DATEDIF(dob, TODAY(), "y") for years, =DATEDIF(dob, TODAY(), "ym") for months, and =DATEDIF(dob, TODAY(), "md") for days. Our tool gives you the same result instantly without formulas.
Age in years is the target year minus the birth year, reduced by one if the birthday has not yet occurred that year. The remaining months and days are counted from the last birthday. The calculator uses real calendar days instead of dividing by 365, so leap years do not cause drift.
Yes. It is a completely free online age calculator with no signup, no login and no limit on how many times you use it. It works in any mobile or desktop browser in India and everywhere else, and your date of birth is processed in your browser rather than sent to a server.
Enter your date of birth above and the calculator shows your total age in days, alongside total weeks, months and hours. This is an exact calendar day count that includes every leap day since you were born.
You can, but it will be approximate. Subtracting birth year from current year ignores whether your birthday has already passed this year, so it is wrong for roughly half the year. Entering the full date of birth gives your exact completed age, which is what forms and applications ask for.
Switch to Age Difference mode and enter both dates of birth. The tool reports the gap in years, months and days and states who is older. It gives you the figure only and does not offer any opinion on whether a particular age gap is suitable.
No. This tool calculates chronological age from a date of birth only. Gestational age is a pregnancy calculation based on the last menstrual period, and biological age is estimated from health and lifestyle measures. Both use entirely different formulas and are not covered here.