Convert Tsubo to Square Chains
Convert Tsubo (坪) to Square Chains (ch²) instantly and accurately.
Conversion Formula
ch² = 坪 × 0.008168772941
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 Chains
A square chain (ch²) is a surveying unit equal to the area of a square with sides of one Gunter's chain (66 feet or ~20.12 m), approximately 404.69 m². Ten square chains equal exactly one acre, making it the natural subdivision unit in traditional land surveying. The US Public Land Survey System used chains to lay out townships and sections, and square chains appear throughout old legal property descriptions and government land grants across North America. One square chain equals exactly 16 square rods.
Quick Reference Table
| Tsubo (坪) | Square Chains (ch²) |
|---|---|
| 1 坪 | 0.00816877 ch² |
| 2 坪 | 0.0163375 ch² |
| 5 坪 | 0.0408439 ch² |
| 10 坪 | 0.0816877 ch² |
| 25 坪 | 0.204219 ch² |
| 50 坪 | 0.408439 ch² |
| 100 坪 | 0.816877 ch² |