Convert Tsubo to Barns
Convert Tsubo (坪) to Barns (b) instantly and accurately.
Conversion Formula
b = 坪 × 3.305785124e+28
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 Barns
A barn (b) is a unit of area used in nuclear and particle physics to measure effective cross-sections of atomic nuclei and particle interaction probabilities. Equal to 10⁻²⁸ m² (10⁻²⁴ cm²), it was humorously named during the Manhattan Project - physicists joked that uranium nuclei were 'as big as a barn' at the subatomic scale. Particle physics experiments at accelerators like CERN report cross-sections in millibarns (mb), microbarns (μb), nanobarns (nb), and femtobarns (fb).
Quick Reference Table
| Tsubo (坪) | Barns (b) |
|---|---|
| 1 坪 | 3.306 × 1028 b |
| 2 坪 | 6.612 × 1028 b |
| 5 坪 | 1.653 × 1029 b |
| 10 坪 | 3.306 × 1029 b |
| 25 坪 | 8.264 × 1029 b |
| 50 坪 | 1.653 × 1030 b |
| 100 坪 | 3.306 × 1030 b |