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How Old Is Your Baby? Use Our Baby Age Calculator.

Calculate Baby's Age in Days, Weeks and Months

"How old is your baby?" It seems like a simple enough question to answer, but before you respond, maybe you should ask, "Would you like the answer in days, weeks, months or years?"

Different people keep track of time in different ways. During early babyhood, it's common to keep track of a child's age in weeks. At some point, however, people jump to tracking in months, and then eventually they switch to years. There is no right or wrong way to keep track of your baby's age. This calculator will help you see exactly how old your baby is -- any way you look at it.

How old is your baby?

To calculate how many days, weeks and months old your baby is, please enter your baby's date of birth below. (Note: your browser must be JavaScript enabled.)


Use this format: january 1, 1998


Your baby is

days old,
weeks old,
Or months old
(based on a 30-day month)



WHAT PEOPLE ARE SAYING ABOUT...

How Old Is Your Baby? Use Our Baby Age Calculator.

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Anonymous says
3 weeks, 6 days ago

That's because months are varying lengths, averaging of 30.4167 days long. That means that there are an average of 4.345 weeks per month. It's easier to calculate in your head if you round it to 4 and 1/3 weeks per month.

Anonymous says
3 weeks, 6 days ago

That's because months are varying lengths, averaging of 30.4167 days long. That means that there are an average of 4.345 weeks per month. It's easier to calculate in your head if you round it to 4 and 1/3 weeks per month.

Anonymous says
January 4, 2010

My health nurse said at four months you start counting by calendar month rather than weeks. And by four months, she meant calendar month... Confusing!

Anonymous says
December 14, 2009

your baby is 4 months. count weeks from your babys birthday and you will find you will be back at your babys birthday at 52 weeks....does that make sense? i was confused too until i counted the weeks and this website is wrong!

Anonymous says
December 9, 2009

am i the only one really confused by this? My baby is 16 weeks old if you count her age by weeks (which would make you think she is 4 months? but if you go by a calander she is only 3 months) im so confused!

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