I did my calculations for calibrations. I'm using this page and this calculator works nicely. Below are my printer's axis vitals.
Motor M42SP-6TG with a 7.5º step and a 16 tooth gear driving a belt that looks like it might have 1mm pitch
NEMA 17 with a 1.8º step and a 20 tooth gear driving an MXL belt with a pitch of 2.03mm
NEMA 17 with a 1.8º step directly driving an SAE 5/16 rod with 16 threads per inch.
I know this is dry reading but I kind of am just documenting my shiz for later reference. Anyone using similar equipment would get similar results. These are all preliminary too and I'll have to devise a way to test the accuracy of all of this.