GaussMem is a computational chemistry tools able to evaluate the amount of memory required for Quantum Mechanical theoretical calculations. This tool has been ported to the humble ZX Spectrum! The original version won the Pascalated Basic Contest in 2022: now a faster, quicker and more efficient version has been compiled with Boriel ZX Basic and is available for free! GaussMem runs on authentic ZX Spectrum computers (48K or 128K), ZX Spectrum Next / N-Go, or any emulator or clone. Download and enjoy computational chemistry with GaussMem!