Square Inches to Qing (Chinese) (in² to qing)

1 square inch equals 9.6774×10⁻⁹ qing (Chinese) exactly.

1 square inch = 9.6774×10⁻⁹ qing (Chinese)

How to convert square inches to qing (Chinese)

To convert square inches to qing (Chinese), multiply the number of square inches by 9.6774×10⁻⁹. This factor is exact. To go the other way, multiply qing (Chinese) by 103,333,540 (rounded).

qing (Chinese) = square inches × 9.6774×10⁻⁹

Example: 10 square inches = 9.6774×10⁻⁸ qing (Chinese).

About these units

Square Inch (in²)

US & ImperialCurrent unit

A square one inch on a side, exactly 6.4516 cm². Used for small parts and for pressure (pounds per square inch).

Latin uncia, one twelfth, gave English the inch, which Old English borrowed as ynce. A statute of Edward II in 1324 defined it as three barleycorns, dry and round, set end to end, and the barleycorn remained the base for centuries after 1066. The modern square inch rests on a 20th-century agreement: the United States adopted a yard of exactly 0.9144 meter on 1 July 1959, the United Kingdom followed effective 1 January 1964, and the inch became exactly 25.4 mm.

Squaring that gives exactly 6.4516 cm² for one square inch, and one square meter is about 1,550 of them. Its best-known descendant is the pound per square inch, psi, the pressure unit still used for American tires and air tanks: atmospheric pressure at sea level is about 14.7 psi, a car tire is typically inflated to around 32 psi above the surrounding air, and one psi is about 6.895 kilopascals. The square inch itself is common in the US and UK for small parts and printed material.

1 square inch = 0.00064516 square meters (exactly).

Sources: Wikipedia: Square inch; Wikipedia: Inch; Wikipedia: Pounds per square inch

Qing (Chinese) (qing)

ChineseTraditional unit (still used in some regions)

100 mu: about 6.67 hectares (66,667 m²). A traditional Chinese land unit.

Where the mu suits a family plot, the qing counts large holdings. It is defined as 100 mu, which comes to 6.67 hectares in the modern market system, or about 16.47 acres. Wikipedia glosses it in English as the Chinese hide, borrowing an old English term for a household's farmland.

Its size depends entirely on the mu beneath it. With the 1915 mu of 614.4 m² a qing was about 6.1 hectares, and with the 1930 mu of 666.67 m² it is the figure used here. Older dynasty values were smaller still, as the Han mu worked out to only about 461 m². The qing is now mostly a historical and literary term, and Chinese agriculture reports land in mu, hectares or, for large areas, in ten thousands of mu.

1 qing (Chinese) = 66,666.66667 square meters (approximately).

Sources: Wikipedia: Chinese units of measurement; Wikipedia: Mu (unit)

Related conversions

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