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Comparison of 1 square foot with some Imperial and metric units of area. The square foot (pl. square feet; abbreviated sq ft, sf, or ft 2; also denoted by ' 2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States, Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar, Singapore and Hong Kong.
The square is an Imperial unit of area that is used in the construction industry in the United States and Canada, [1] and was historically used in Australia. One square is equal to 100 square feet . Examples where the unit is used are roofing shingles, metal roofing, vinyl siding, and fibercement siding products.
One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.
San Francisco is an extreme example: water makes up nearly 80% of its total area of 232 square miles (601 km 2). In many cases an incorporated place is geographically large because its municipal government has merged with the government of the surrounding county.
The standard block in Manhattan is about 264 by 900 feet (80 m × 274 m). In Chicago , a typical city block is 330 by 660 feet (100 m × 200 m), [ 2 ] meaning that 16 east-west blocks or 8 north-south blocks measure one mile, which has been adopted by other US cities.
This list of skyscrapers by floor area includes the largest skyscrapers in the world, measured in square meters (m 2) and square feet (sq ft). To qualify as a skyscraper, a structure must be self-supporting, without relying on tension cables or external supports for stability, and must reach a minimum height of 150 meters (492 feet).
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One square yard is equivalent to: 1,296 square inches; 9 square feet; ≈0.00020661157 acres; ≈0.000000322830579 square miles; 836 127.36 square millimetres; 8 361.2736 square centimetres; 0.83612736 square metres; 0.000083612736 hectares; 0.00000083612736 square kilometres; 1.00969 gaj [1]