Convert Chō to Square Centimeter
Convert chōs to square centimeters instantly. 1 chō = 9.91736e+7 square centimeter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Centimeter to Chō converter for the reverse conversion.
Units explained
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 Centimeter
A square centimeter is a metric unit of area equal to 10⁻⁴ m² (1 cm × 1 cm). It is widely used in everyday measurement, lab work, and small-area applications.
Derived by squaring the centimeter (1/100 of a meter). The centi- prefix comes from the Latin 'centum' (hundred).
Square centimeters express the cross-sectional area of pipes and cables, the surface area of small everyday objects, biological tissue samples, and many engineering quantities. The SI unit for medical/pharmaceutical dose-per-area is often expressed in cm².
Centimeter has been part of the metric system since 1795.
Chō to Square Centimeter conversion formula
The relationship between chōs and square centimeters:
To convert chōs to square centimeters, multiply the value in chōs by 9.91736e+7. To reverse, multiply square centimeters by 1.008333e-8.
How to use this converter
Type a value into the calculator. The result in square centimeters 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 Centimeter to Chō converter for the reverse direction.
Step-by-step: convert chōs to square centimeters
- Write down the value in chōs (chō).
- Multiply that value by the factor 9.91736e+7.
- The product is the equivalent value in square centimeters (cm²).
- To reverse, multiply the square centimeter value by 1.008333e-8.
Worked examples
Example 1 — Convert 1 chō to cm²:
1 × 9.91736e+7 = 9.91736e+7 cm²
Example 2 — Convert 100 chō to cm²:
100 × 9.91736e+7 = 9.91736e+9 cm²
Real-world example — Long-haul to feature-scale
One chō equals one billion square centimeters — useful in fiber-optic engineering, where total cable length is given in the larger unit but feature-level attenuation depends on micro-scale variations.
1 chō × 9.91736e+7 = 9.91736e+7 cm²
Real-world example — Geographic to fiber-optic scale
One chō equals one billion square centimeters. This conversion appears in fiber-optic specifications, where total link length is given in chōs but signal attenuation depends on micro-scale variations along the fiber.
1 chō × 9.91736e+7 = 9.91736e+7 cm²
Chō to Square Centimeter conversion table
Standard reference values for converting chōs to square centimeters:
| Chō [chō] | Square Centimeter [cm²] |
|---|---|
| 0.01 | 991736 |
| 0.1 | 9917360 |
| 1 | 9.91736e+7 |
| 2 | 1.983472e+8 |
| 3 | 2.975208e+8 |
| 4 | 3.966944e+8 |
| 5 | 4.95868e+8 |
| 10 | 9.91736e+8 |
| 20 | 1.983472e+9 |
| 30 | 2.975208e+9 |
| 40 | 3.966944e+9 |
| 50 | 4.95868e+9 |
| 100 | 9.91736e+9 |
| 500 | 4.95868e+10 |
| 1000 | 9.91736e+10 |
Frequently asked questions
How many square centimeters is 1 chō?
How do I convert chōs to square centimeters?
How do I convert square centimeters back to chōs?
How many square centimeters is 100 chōs?
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Sources & references
Conversion factor (1 chō = 9.91736e+7 cm²) 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.