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GD&T Basics: Online Training Resource

Whether you are new to GD&T or have a full engineering background, our site provides the most valuable resource for training and reference that you will find anywhere – GD&T Basics

This site is one of my all time favourites for Geometric Dimensioning and Tolerancing. There are loads of clear examples, videos and great diagrams to help explain concepts.


  • Diagrams and videos are fantastic
  • Worked examples in each topic
  • It’s high quality information and it’s free!


  • Sometimes isn’t clear on which standard  (ISO, ASME, BS etc.) interpretation is being referred to

Check out their website at

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