Convert Square Meter to Chō
Convert square meters to chōs instantly. 1 square meter = 0.0001008333 chō — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Chō to Square Meter converter for the reverse conversion.
Units explained
Square Meter
A square meter is the SI base unit of area, defined as the area of a square with sides of one meter. It is the universal scientific unit for area.
Defined by squaring the meter, which was redefined in 2019 in terms of the speed of light. The meter itself was originally proposed by the French Academy of Sciences in 1791 as 1/10,000,000 of the distance from the equator to the North Pole.
Square meters are the universal SI unit for area, used in real estate (most countries outside the US/UK), construction, physics, engineering, materials science, biology, and nearly all scientific contexts worldwide.
Meter adopted as SI base unit in 1960; current exact definition via speed of light dates to 2019.
Chō
A chō is a Japanese unit of large-scale area equal to approximately 9917.36 m² (about 0.991 hectare or 2.45 acres). It equals 3,000 tsubo.
Traditional Japanese land area unit, used historically for rice paddies and large estates.
Chōs appear in Japanese agricultural records and historical land documents. Modern usage favors hectares for new transactions but legacy records remain.
Traditional Japanese unit; standardized via the tsubo definition.
Square Meter to Chō conversion formula
The relationship between square meters and chōs:
To convert square meters to chōs, multiply the value in square meters by 0.0001008333. To reverse, multiply chōs by 9917.36.
How to use this converter
Type a value into the calculator. The result in chōs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Chō to Square Meter converter for the reverse direction.
Step-by-step: convert square meters to chōs
- Write down the value in square meters (m²).
- Multiply that value by the factor 0.0001008333.
- The product is the equivalent value in chōs (chō).
- To reverse, multiply the chō value by 9917.36.
Worked examples
Example 1 — Convert 1 m² to chō:
1 × 0.0001008333 = 0.0001008333 chō
Example 2 — Convert 100 m² to chō:
100 × 0.0001008333 = 0.0100833286 chō
Real-world example — Metric distance scale-up
One thousand square meters equals one chō — the running distance for a 1K race or the standard metric kilometre-scale step. The simple thousand-fold conversion is the most-used metric distance translation.
1000 m² × 0.0001008333 = 0.1008332863 chō
Real-world example — Imperial mile arithmetic
5,280 square meters equals exactly one chō. American hikers tracking elevation gain in the smaller unit but trail length in the larger one use this constant every time they read a topographic map.
5280 m² × 0.0001008333 = 0.5323997515 chō
Real-world example — Imperial yard-to-mile scale
1,760 square meters equals exactly one chō. American athletes and surveyors use this conversion to translate distances quoted in the smaller imperial unit into recognizable fractions of the larger geographic one.
1760 m² × 0.0001008333 = 0.1774665838 chō
Square Meter to Chō conversion table
Standard reference values for converting square meters to chōs:
| Square Meter [m²] | Chō [chō] |
|---|---|
| 0.01 | 1.008333e-6 |
| 0.1 | 1.008333e-5 |
| 1 | 0.0001008333 |
| 2 | 0.0002016666 |
| 3 | 0.0003024999 |
| 4 | 0.0004033331 |
| 5 | 0.0005041664 |
| 10 | 0.0010083329 |
| 20 | 0.0020166657 |
| 30 | 0.0030249986 |
| 40 | 0.0040333315 |
| 50 | 0.0050416643 |
| 100 | 0.0100833286 |
| 500 | 0.0504166431 |
| 1000 | 0.1008332863 |
Frequently asked questions
How many chōs is 1 square meter?
How do I convert square meters to chōs?
How do I convert chōs back to square meters?
How many chōs is 100 square meters?
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Imperial / US Customary (15 units)
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Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Sources & references
Conversion factor (1 m² = 0.0001008333 chō) 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.