Convert Tsubo to Square Foot
Convert tsubos to square feet instantly. 1 tsubo = 35.5833350556 square foot — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Foot to Tsubo converter for the reverse conversion.
Units explained
Tsubo
A tsubo is a Japanese unit of area equal to approximately 3.3058 m² (about 35.58 square feet). It is functionally identical to the Korean pyeong.
Defined as a 6-by-6 shaku square; the shaku is the traditional Japanese foot. Standardized as 400/121 m² in modern Japanese law.
Tsubos remain in widespread use in Japanese real estate, particularly for residential apartments and small commercial spaces. Property listings often cite both tsubo and square meters.
Traditional Japanese unit; legally retained in Japan for real estate.
Square Foot
A square foot is an imperial unit of area equal to exactly 0.09290304 m². It is the dominant unit for real estate area measurement in the United States and is widely used in India for residential property listings.
Derived by squaring the foot. The foot was standardized to exactly 0.3048 m via the 1959 International Yard and Pound Agreement.
Square feet are the standard unit for US real estate floor area, HVAC capacity ratings (BTU per ft²), commercial leasing, and construction. In India, square feet is the dominant unit for residential property advertisements alongside traditional regional units.
Foot dates to ancient civilizations; modern exact value standardized in 1959.
Tsubo to Square Foot conversion formula
The relationship between tsubos and square feet:
To convert tsubos to square feet, multiply the value in tsubos by 35.5833350556. To reverse, multiply square feet by 0.0281030431.
How to use this converter
Type a value into the calculator. The result in square feet updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Foot to Tsubo converter for the reverse direction.
Step-by-step: convert tsubos to square feet
- Write down the value in tsubos (tsubo).
- Multiply that value by the factor 35.5833350556.
- The product is the equivalent value in square feet (ft²).
- To reverse, multiply the square foot value by 0.0281030431.
Worked examples
Example 1 — Convert 1 tsubo to ft²:
1 × 35.5833350556 = 35.5833350556 ft²
Example 2 — Convert 100 tsubo to ft²:
100 × 35.5833350556 = 3558.3335055559 ft²
Real-world example — Fabric and tailoring
One tsubo of fabric converts to a value in square feet commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 tsubo × 35.5833350556 = 35.5833350556 ft²
Real-world example — Body height conversion (reverse direction)
You measure 1.75 tsubos tall and need to fill in a gym membership form or medical record that asks for height in square feet. This is the most-used everyday length conversion in metric-using countries.
1.75 tsubo × 35.5833350556 = 62.2708363472 ft²
Real-world example — Pet and accessory dimensions
A 3-tsubo dog leash equals a tidy round value in square feet. Pet-supply shopping frequently mixes the two units across product specifications.
3 tsubo × 35.5833350556 = 106.7500051667 ft²
Tsubo to Square Foot conversion table
Standard reference values for converting tsubos to square feet:
| Tsubo [tsubo] | Square Foot [ft²] |
|---|---|
| 0.01 | 0.3558333506 |
| 0.1 | 3.5583335056 |
| 1 | 35.5833350556 |
| 2 | 71.1666701111 |
| 3 | 106.7500051667 |
| 4 | 142.3333402222 |
| 5 | 177.9166752778 |
| 10 | 355.8333505556 |
| 20 | 711.6667011112 |
| 30 | 1067.5000516668 |
| 40 | 1423.3334022224 |
| 50 | 1779.1667527779 |
| 100 | 3558.3335055559 |
| 500 | 17791.6675277795 |
| 1000 | 35583.335055559 |
Frequently asked questions
How many square feet is 1 tsubo?
How do I convert tsubos to square feet?
How do I convert square feet back to tsubos?
How many square feet is 100 tsubos?
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 tsubo = 35.5833350556 ft²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.