- 平方米 píngfāngmǐ square metersquare meter; a standard unit of area equal to ten thousand square centimeters
- 平方公里 píngfānggōnglǐ square kilometersquare kilometer; a unit of area equal to one million square meters
- 平方根 píngfānggēn square rootthe number that, when multiplied by itself, equals a given number; also known as [[二乘根|二乘根|er4 cheng2 gen1]] or [[二次根|二次根|er4 ci4 gen1]]
- 平方英尺 píngfāngyīngchǐ square footunit of area equal to approximately 0.093 square meters
- 开平方 kāipíngfāng to extract a square rootto calculate the square root of a number; extraction of a square root
- 平方平均数 píngfāngpíngjūnshù root mean squareroot mean square (RMS); quadratic mean
- 最小平方法 zuìxiǎopíngfāngfǎ least squares methodA mathematical optimization technique used to find the best-fitting curve for a set of data by minimizing the sum of the squares of the errors; used primarily in statistics and Taiwan.
- 开平方法 kāipíngfāngfǎ square root extractionthe method or process of extracting a square root
- 平方公分 píngfānggōngfēn square centimetera unit of area equal to a square with sides of one centimeter
- 平方公尺 píngfānggōngchǐ square metera unit of area; one square meter is equal to 10,000 [[平方公分|平方公分|ping2 fang1 gong1 fen1]]
- 平方千米 píngfāngqiānmǐ square kilometerA unit of area equal to 1,000,000 square meters or 100 hectares; also known as [[平方公里|平方公里|ping2 fang1 gong1 li3]].
- 平方反比定律 píngfāngfǎnbǐdìnglǜ inverse-square lawinverse-square law in physics
- 平方反比律 píngfāngfǎnbǐlǜ inverse square lawinverse square law in physics
