Convert Square Inches to Tsubo
Convert Square Inches (in²) to Tsubo (坪) instantly and accurately.
Conversion Formula
坪 = in² × 0.0001951609
About Square Inches
A square inch (in²) is an imperial unit of area equal to a square with sides of one inch (25.4 mm × 25.4 mm). It is commonly used in the United States for measuring small areas like fabric swatches, screen sizes, or printed materials. A standard business card is about 6 in², and a typical smartphone screen might be 15-20 in². This unit remains prevalent in American manufacturing, printing, and retail.
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.
Quick Reference Table
| Square Inches (in²) | Tsubo (坪) |
|---|---|
| 1 in² | 0.000195161 坪 |
| 2 in² | 0.000390322 坪 |
| 5 in² | 0.000975804 坪 |
| 10 in² | 0.00195161 坪 |
| 25 in² | 0.00487902 坪 |
| 50 in² | 0.00975804 坪 |
| 100 in² | 0.0195161 坪 |