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Age Calculator (How Old Am I?)

Our age calculator tool works out your age in years, months, weeks and days and tells you what day you were born on.

Disclaimer: Whilst every effort has been made in building this calculator, we are not to be held liable for any damages or monetary losses arising out of or in connection with the use of it. This tool is here purely as a service to you, please use it at your own risk. Full disclaimer. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate calculations.


How old am I today?

If you want to know exactly how old you are, we can use mathematical calculation to find out or we can use a calculator. With the age calculator, you can easily discover how many years, months, weeks, days and hours have passed since you were born. If you know the time of your birth, enter it into the second box for an even more precise result. You may, very specifically, want to know:

How old was I on X date?

Should you want to know how old you were on a certain date in past history, or how old you will be at a future date, we've got you covered. Simply make use of our 'Age at Date' option to enter a date in either the past or future. Our calculator will then make a calculation based upon that date.

Calculating your age

Your age can be calculated by finding the difference between your date of birth and the current date. What we are specifically finding out is how much time has passed since you were born. We can, of course, perform a rough calculation by subtracting the year of your birth from the current year, which will give you a figure for how many years old you are, or will be, in the current year.

age (years) = current year - birth year

As an example, if I was born in 1995, my age in 2021 will be: 2021 - 1995 = 26 years.

Of course, this only gives you a rough figure for how many years old you will be in the current year - it doesn't take into consideration the month and day of your birth compared to today's month and day. To calculate your exact age, including months and days, you need to deduct the numerical month and day of your birth from the current month and day.

How many days old am I?

People regularly ask how they can work out their age, and I point them to this calculator (it's one of the reasons I created it). Although you can have a rough guess by multiplying your age in years by 365, you could still be out by up to several hundred days. This will in most part be because you'll be working on the basis of your age at your last birthday, and therefore excluding the days since.

There's also leap years to take into consideration. These occur once every four years and mean an extra day in the calendar (366 days in the year). Your best way to get an accurate calculation to how old you are in days is, therefore, to use the age calculator tool provided.

How old was the oldest person ever?

The oldest person ever recorded was Jeanne Calment, a woman from France. She was born on February 21, 1875 and lived until the age of 122 years and 164 days before passing away on August 4, 1997. (ref)

Of the top 10 oldest people ever, all 10 are currently women. The oldest man ever is currently recorded as being Jiroemon Kimura from Japan. Plugging his date of birth into our age calculator tool reveals that he lived until the age of 116 years and 54 days. He passed away on June 12, 2013.

With that said, Fredie Blom, a South African man born on 8 May 1904, was recorded as 'unofficially' the world's oldest man ('unofficial' because he wasn't listed in the Guinness Book of World Records). Fredie died on 22 August 2020 at a said age of 116 years, 3 months, and 14 days.

Famous people who turn 50 years of age in 2021
Name When age 50? Name When age 50?
Mark WahlbergJune 5 Tupac ShakurJune 16
Amy PoehlerSeptember 16 Lance ArmstrongSeptember 18
Snoop DoggOctober 20 Winona RyderOctober 29
Jeremy RennerJanuary 7 Ewan McGregorMarch 31
Sacha Baron CohenOctober 13 Johnny KnoxvilleMarch 11
David TennantApril 18 Elon MuskJune 28
Julian AssangeJuly 3 Christina ApplegateNovember 25
Corey HaimDecember 23 Ricky MartinDecember 24
Mary J. BligeJanuary 11 Charlie BrookerMarch 3
Ajith KumarMay 1 George OsborneMay 23
Lisa LopesMay 27 Marco RubioMay 28
Mark LoMonacoJuly 14 Vitali KlitschkoJuly 19
Chris TuckerAugust 31 Jenna ElfmanSeptember 30
Jared LetoDecember 26 Pep GuardiolaJanuary 18
Denise RichardsFebruary 17 Peter SarsgaardMarch 7

The above data is courtesy of Famous Birthdays.

Visit the birthday calculator to find out your star sign, chinese zodiac sign, birthstone, famous people that you share your birthday with and the number one song and movie on your birthday.

How to age well

A government researcher once quipped that "Age is an issue of mind over matter. If you don't mind, it doesn't matter." Luis Bunuel, the Spanish filmmaker, joked that "Age is something that doesn't matter unless you're a cheese". Perhaps we can also add 'wine' to that?

These quotes are, of course, meant to be whimsical. There's little doubt that while you can't control your age, or predict what might happen to you, you can take actions to keep yourself healthy and give yourself the best chance of reaching a ripe old age. From food, to exercise and looking after your mental health. Here's a great article about how to age well from the New York Times.

Sharing your age

Should you wish to share your age calculation with others, you can do so by copying the link at the bottom of the age calculator results section. If you would like to find out how many hours or days there are between two dates, we have a Days Between Dates Calculator available.


If you have any problems using this age calculator, please contact me.