I’ve been working on a magnetic levitation project, and I needed an electromagnet. The electromagnet I made has about 600 feet of 24AWG magnet wire wrapped around a custom 3D printed spool, and has a low carbon steel laminated core.

Given the radius and height of a cylinder and the desired width of each layer, this simple calculator calculates the width of each layer and the total area of the layers. For example, this could be used to make a cylinder out of a sheet of metal by stacking rectangular strips (and avoiding having to cut circles). Open this post and click the “calculate” button to see how it works.