Convert Square Furlongs to Square Thou
Convert Square Furlongs (fur²) to Square Thou (thou²) instantly and accurately.
Conversion Formula
thou² = fur² × 62726400000000
About Square Furlongs
A square furlong is an area unit equal to a square with sides of one furlong (220 yards or ~201.17 m), approximately 40,469 m² or exactly 10 acres. The furlong (from Old English 'furrow-long') was historically the standard ploughing distance, and 10 square furlongs equals one acre - a relationship that made traditional land surveying convenient. While square furlongs are rarely used in official modern measurements, they appear in historical land surveys, British horse racing contexts, and as a handy reference for visualising 10-acre blocks.
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.
Quick Reference Table
| Square Furlongs (fur²) | Square Thou (thou²) |
|---|---|
| 1 fur² | 6.273 × 1013 thou² |
| 2 fur² | 1.255 × 1014 thou² |
| 5 fur² | 3.136 × 1014 thou² |
| 10 fur² | 6.273 × 1014 thou² |
| 25 fur² | 1.568 × 1015 thou² |
| 50 fur² | 3.136 × 1015 thou² |
| 100 fur² | 6.273 × 1015 thou² |