平方米在港台地区称为平方米，是面积的公制单位。英文：square meter，用m²符号表示，定义为边长为1米的正方形的面积。在生活中平方米通常简称为“平米”或“平方”。
平方英尺平方英尺（Square foot）是一个英制面积单位，简写为sq. ft 或 ft²，1平方英尺约等于929.0304 平方厘米。
平方米转平方英尺换算表平方米 (m²)平方英尺 (ft²)0.1 m²1.07639 ft²0.5 m²5.38196 ft²1 m²10.7639 ft²1.5 m²16.1459 ft²2 m²21.5278 ft²3 m²32.2917 ft²4 m²43.0557 ft²5 m²53.8196 ft²6 m²64.5835 ft²7 m²75.3474 ft²8 m²86.1113 ft²9 m²96.8752 ft²10 m²107.639 ft²11 m²118.403 ft²12 m²129.167 ft²13 m²139.931 ft²14 m²150.695 ft²15 m²161.459 ft²16 m²172.223 ft²17 m²182.987 ft²18 m²193.75 ft²19 m²204.514 ft²20 m²215.278 ft²25 m²269.098 ft²30 m²322.917 ft²35 m²376.737 ft²40 m²430.557 ft²45 m²484.376 ft²50 m²538.196 ft²平方米 (m²)平方英尺 (ft²)55 m²592.015 ft²60 m²645.835 ft²65 m²699.654 ft²70 m²753.474 ft²75 m²807.294 ft²80 m²861.113 ft²85 m²914.933 ft²90 m²968.752 ft²95 m²1022.57 ft²100 m²1076.39 ft²150 m²1614.59 ft²200 m²2152.78 ft²250 m²2690.98 ft²300 m²3229.17 ft²350 m²3767.37 ft²400 m²4305.57 ft²450 m²4843.76 ft²500 m²5381.96 ft²550 m²5920.15 ft²600 m²6458.35 ft²650 m²6996.54 ft²700 m²7534.74 ft²750 m²8072.94 ft²800 m²8611.13 ft²850 m²9149.33 ft²900 m²9687.52 ft²950 m²10225.72 ft²1000 m²10763.92 ft²5000 m²53819.58 ft²