Accuracy is quoted for an object size, and the size is part of the figure
The best 3D scanners for 2026
A 3D scanner turns an object into a mesh that can be edited, printed or measured, and its headline figure is the least self-explanatory on this site. Accuracy is quoted in millimetres or fractions of one, and it only means something beside the conditions the maker attaches — the size of the object, the distance, and whether the figure is a single-frame or a volumetric one over a whole scan. A listing that prints the number without the condition is quoting the best case. The technology divides the shelf: structured light projects a pattern and suits small and medium objects indoors, infrared suits people and larger forms, and laser lines suit shiny or dark surfaces that other methods struggle with. The object size range is published as a minimum and a maximum, and it is the specification that decides whether a coin and a car door are both possible. Tracking is how the scanner knows where it is: geometry, texture, or small reflective markers stuck on the object, which work everywhere and take time. Then the output formats the software exports, whether processing needs a powerful computer or runs on a phone, and whether a turntable is included. We compare published accuracy and its conditions, technology, object size range, tracking method, output formats and computing requirements.
