Scale math made useful at the workbench.

Miniature Scale Project Converter helps model makers keep an entire build in one worksheet. It combines scale conversion, metric and imperial results, practical ruler fractions, rounding differences, and 3D slicer percentages.

Why this tool is different

Many calculators convert one number at a time. This project is designed for doors, walls, windows, furniture, figures, and other parts that belong together.

How calculations are checked

The calculation engine is tested against fixed conversion examples. Exact values are preserved internally, while ruler fractions are presented separately with their rounding difference.

Editorial principles

• Use original formulas, examples, and explanations.
• Distinguish exact results from practical rounded measurements.
• Avoid claiming one named hobby scale always has the same ratio in every region.
• Review guides when calculations, terminology, or supported features change.

Last reviewed: July 11, 2026