Everyone has one. Even dogs have one. I’m talking about date of birth. In this video you’ll learn how to calculate age from the date of birth using DATEDIF, a super-secret Excel function, so secret that it doesn’t appear in Excel’s Functions drop-down list!

So whether you need to calculate the age of a person in whole years or the age of a puppy in weeks, check out this short video. Links to the video and individual sections below…
Use the DATEDIF Function to Calculate Age in Years