Square foot - Wikipedia
https://en.wikipedia.org/wiki/Square_foot
WEBThe square foot ( pl. square feet; abbreviated sq ft, sf, or ft2; also denoted by ' 2) is an imperial unit and U.S. customary unit (non- SI, non- metric) of area, used mainly in the United States and partially in Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar, Singapore and Hong Kong. [citation ...
DA: 21 PA: 60 MOZ Rank: 24