How Many People Share Your Birthday?

Here's your nightly math! Just 5 quick minutes of number fun for kids and parents at home. Read a cool fun fact, followed by math riddles at different levels so everyone can jump in. Your kids will love you for it.

How Many People Share Your Birthday?

March 6, 2018

Your birthday is the best, most awesome day in the world. It marks an exact number of years since the day you were born. So our fan Megan S. asked, how many people share your birthday? Then our fan Paige O. asked us, how many babies are born each day? They’re really asking the same thing. Every day about 353,000 babies are born! That comes to more than 240 babies every minute, and the number keeps going up. So lots of people share your birthdate, and many of those people even have the same exact time as yours listed on their birth certificates. But don’t worry — you still get your own cake.

Wee ones: How many years ago were you born? Count up to your age!

Little kids: How old will you be on your next birthday?  Bonus: What’s the month and date of your birthday? How many months until your next birthday?

Big kids: Which do you think is closer, your last birthday or the birthday that’s coming up? Bonus: If 240 babies are born each minute, how many babies are born each second? (Reminder if needed: there are 60 seconds in a minute.)

The sky’s the limit: If 353,000 babies (including you) were born the day you were born, how many people share your exact birthdate?




Wee ones: Different for everyone…and count 1, 2, 3…to your age.

Little kids: Different for everyone: add 1 to your age today. Bonus: Different for everyone again. If you read this in March and your birthday is April, that’s about 1 month away; May is 2 months away; and so on.

Big kids: For birthdays from March 7 through April, May, up to and including September 4, your next birthday is closer (if you read this on March 6). For birthdays since last September 5 up to today, your last birthday is closer.  Bonus: 4 babies every second!

The sky’s the limit: 352,999 other people.

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About the Author

Laura Overdeck

Laura Overdeck

Laura Bilodeau Overdeck is founder and president of Bedtime Math Foundation. Her goal is to make math as playful for kids as it was for her when she was a child. Her mom had Laura baking before she could walk, and her dad had her using power tools at a very unsafe age, measuring lengths, widths and angles in the process. Armed with this early love of numbers, Laura went on to get a BA in astrophysics from Princeton University, and an MBA from the Wharton School of Business; she continues to star-gaze today. Laura’s other interests include her three lively children, chocolate, extreme vehicles, and Lego Mindstorms.

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