Birthday Calculator

icon of birthday celebrations

Enter your date of birth into the birthday calculator and discover what day you were born on and how long you've been alive in days, months and years. In addition, find out your star sign, your chinese zodiac sign, your birthstone, the number of days until your next birthday and the celebrities that you share your birthday with.

  Click here to choose your birthday


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Whilst every effort has been made in building this birthday calculator, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. This birthday calculator is here purely as a service to you, please use it at your own risk. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate conversions.

Please see the full disclaimer for more information.

Features of the birthday calculator

Find out the following:

  • Your star sign
  • The day on which you were born
  • Your exact age in years, months and days
  • Your Chinese zodiac sign
  • Your birthstone
  • The number of days until your next birthday
  • Famous people who share your birthday
  • Historical events that occurred on your birthday
  • Number one songs on your birthday

As with all of the calculators on my website, I love to receive suggestions for additional features. So, if you would like to see any new features added to this birthday calculator, please contact me.

On what day was I born?

Use the birthday calculator to find out how many hours, days, months and years you've been alive for and what day you were born on. Simply enter your date of birth into the calculator and click the 'calculate' button. An age calculator is also available.

Famous birthdays for 21 August

The birthday calculator will tell you which famous people share your birthday with you. Featured below is a short list of some of the famous people who have birthdays today, Tuesday 21st August. All information is provided by Famous Birthdays.

Hayden Panettiere (1989) Wilt Chamberlain (1936)
Usain Bolt (1986) Sergey Brin (1973)
Brody Jenner (1983) Barun Sobti (1985)
Eve Torres (1984) Kim Cattrall (1956)
Robert Lewandowski (1988) Kacey Musgraves (1988)
Serj Tankian (1967) Carrie-Anne Moss (1967)
Kenny Rogers (1938) William IV of the United Kingdom (1765)
Alizée (1984) Joe Strummer (1952)
Bhumika Chawla (1988) Kelis (1979)
Tyler Winklevoss (1981) Bo Burnham (1990)