High-temperature superconducting (HTS) materials are expected to enable significant advances in various applications, such as particle accelerator magnets and electrical machines. HTS coils are wound from a flat conductor with a large number of turns. Efficient, application specific, numerical models are needed to accelerate calculations and design processes. The aim of this project is to develop a homogeneous 3D finite element model for HTS coils. Homogenization aims to simplify the geometry of the coil, while still obtaining results with sufficient accuracy. This in return is expected to reduce the computational cost of the simulations. The models will be implemented using open-source software GetDP and Gmsh.