Guides
Short and numbers-first. Each guide links to the calculator that does the maths.
How much electricity does a 3D printer use? Measured figuresMeasured power draw for Bambu Lab, Creality, Prusa, Elegoo and Anycubic printers, why the PSU rating misleads, and what a month of printing really costs in the US, UK, EU and Australia.How to calibrate e-steps, rotation distance and flow (Marlin and Klipper)The three extruder calibrations that fix under- and over-extrusion, in order, with the exact commands for Marlin and Klipper and the maths behind each one.Filament density: why 1 kg of ABS prints more than 1 kg of PETGWhat filament density means, the density of every common material, how slicers use it to turn metres into grams, and how to measure it yourself.How much does 3D printing cost? Real numbers for 2026What a 3D print actually costs in filament, electricity, printer wear and time, with worked examples for a 20 g keychain, a 150 g phone stand and a 1 kg helmet.How to price 3D prints for Etsy, eBay and local salesA pricing method that survives marketplace fees: true cost, a fair hourly rate, a margin that reflects design value, and the fee maths that most sellers skip.Why your STL imports tiny (or huge): units, scaling and fixing itSTL files have no units. Here is how slicers guess, why models from inch-based CAD arrive 25.4× too small, how to tell millimetres from inches from the bounding box, and how to rescale without distorting.