Terms of use

This tool provides mathematical estimates for model-making and planning. You remain responsible for checking measurements before cutting, printing, purchasing material, or assembling parts.

No production guarantee

A mathematically scaled dimension does not guarantee that a part can be manufactured or 3D printed. Material, tool, printer, joint, wall-thickness, and tolerance requirements vary.

Rounding

Ruler fractions are practical approximations. The tool displays a rounding difference so you can decide whether the selected precision is suitable.

Scale names

Named scales may vary by country, gauge, manufacturer, or hobby field. Use the actual 1:N ratio for critical work.

Availability

The service may be changed, corrected, or temporarily unavailable. Do not rely on it as the only record of a project.

Last reviewed: July 11, 2026