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Calculate Age
By Richard Rost   Richard Rost on Twitter Richard Rost on LinkedIn Email Richard Rost   3 years ago

How to Properly Calculate Age from Date of Birth

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In this Microsoft Access tutorial, I will teach THE CORRECT WAY to calculate someone's age. I've seen a ton of WRONG tutorials out there that just use DateDiff. No! That's not correct. DateDiff only looks at whole years. If the person's birthday hasn't passed for this year, they will show as older than they are.

Jimmy from Amherst NY (a Silver Member) asks: I saw a tip on YouTube a few days ago that showed how to calculate someone's age using DateDiff, however if I type in my birthday which is in December, and it’s currently November, the calculation is not right! I need an accurate formula for determining age. I run a nightclub and obviously we don't want to serve alcohol 20 year olds!


I'll show you an even better way to calculate age using an advanced formula. The method I show in the free video is 99.9% accurate. The formula in the Extended Cut is 100% accurate.

Silver Members and up get access to view Extended Cut videos, when available. Gold Members can download the database template from class plus get access to the Code Vault. If you signed up on YouTube you have to register on my YouTube Find User page so I can set up your account here on my web site. If you're not a member, Join Today!


  • The "good enough" 99.91% accurate method is: Int((Date()-[DOB])/365.2425)
  • For the 100% accurate method, see the Extended Cut (above) - Silver Members
  • The 100% accurate method can also be found in the Code Vault - Gold Members
  • For confirmation of my testing methods, see Age Part 2



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Keywords: TechHelp Access ms access calculating age from date of birth, calculate current age using date of birth, how to calculate age in ms access, calculating age in access  PermaLink  Calculate Age in Microsoft Access