The goal is to represent brick heights and plate heights in millimetres. When you are constraining and defining parts to interface with Lego - you may find these definitions/calculations using the above symbols useful: SymbolĪlthough studs are the standard unit of Lego measure- to interface with other systems, and for some more complex models, it is useful to have them in standard measurements. They need not be expensive ones, although paying more will give more precision, even a basic set will let you make precise measurements. You may also want to measure things you’ll interface with Lego and 3D printed parts so you understand what margin of error you have.Īn absolutely essential tool for this is a set of digital calipers.

Making Your Own MeasurementsĪlthough measurements on the web are useful when making CAD designs or drawings, it’s always a smart idea to mae further measurements of your own. Note that the cylinders under a standard 2x2 and 2x4 brick are the same diameter as the technic holes for beams and pins. Outer diameter of cylinders (found on underside of bricks) If you want to put Lego bricks into another cad system (ie FreeCAD/Fusion 360/SolidWorks) - you will find the following helpful along with the formula table below: Description This will help designing models, and interfacing Technic Lego with other materials. When building machines and robots with Lego, dimension specifications for the standard bricks are handy.

Dimensions of a lego brick 2x2