Convert Square Thou to Roods
Convert Square Thou (thou²) to Roods (ro) instantly and accurately.
Conversion Formula
ro = thou² × 6.376900316e-13
About Square Thou
A square thou (thou²), sometimes called a square mil, is the area of a square with sides of one thousandth of an inch (0.0254 mm), equal to approximately 6.452 × 10⁻¹⁰ m². This tiny imperial unit is indispensable in precision engineering, PCB (printed circuit board) design, and manufacturing, where conductor widths, dielectric coating thicknesses, and tight machining tolerances are specified in thou. Wire insulation, thin films, and precision-stamped metal components are commonly described using this unit.
About Roods
A rood (ro) is a traditional English unit of land area equal to one quarter of an acre, or 40 square rods, approximately 1,011.71 m². Originating in medieval England, the rood was used alongside the acre and the perch for describing land ownership. The name shares its root with 'rod,' the linear unit used to measure it. While largely obsolete in modern use, roods still appear in old English legal documents, historical land surveys, and certain rural property records in England and Wales.
Quick Reference Table
| Square Thou (thou²) | Roods (ro) |
|---|---|
| 1 thou² | 6.377 × 10-13 ro |
| 2 thou² | 1.275 × 10-12 ro |
| 5 thou² | 3.188 × 10-12 ro |
| 10 thou² | 6.377 × 10-12 ro |
| 25 thou² | 1.594 × 10-11 ro |
| 50 thou² | 3.188 × 10-11 ro |
| 100 thou² | 6.377 × 10-11 ro |