Convert Tsubo to Square Thou
Convert Tsubo (坪) to Square Thou (thou²) instantly and accurately.
Conversion Formula
thou² = 坪 × 5123977190
About Tsubo
A tsubo (坪) is the traditional Japanese unit of floor area, equal to 400/121 m² (approximately 3.306 m²) - defined as the footprint of two tatami mats placed side by side. It has been the standard for measuring rooms and apartments in Japan for centuries and remains widely used in real estate and architecture today. Apartment sizes in Japan are routinely quoted in tsubo alongside square meters. One tsubo equals approximately 35.58 square feet or 3.95 square yards.
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
| Tsubo (坪) | Square Thou (thou²) |
|---|---|
| 1 坪 | 5.124 × 109 thou² |
| 2 坪 | 1.025 × 1010 thou² |
| 5 坪 | 2.562 × 1010 thou² |
| 10 坪 | 5.124 × 1010 thou² |
| 25 坪 | 1.281 × 1011 thou² |
| 50 坪 | 2.562 × 1011 thou² |
| 100 坪 | 5.124 × 1011 thou² |