An acre is 43,560 square feet of area in any shape. This measure of square footage is not surface area, but is instead a measure along a flat plane. A square-shaped acre plot has 208.7 feet per side, and a square mile contains 640 acres.
https://www.reference.com/science/many-square-feet-half-acre-ee4c30b14b1e5854
It is equal to 43 560 square feet, 4840 square yards, or 160 square rods. The precise meaning of this depends on the exact definition adopted for a foot: the international acre is 4 046.856 422 4 m (for the UK, see). For measurements based specifically on the US survey foot the US survey acre is ca. 4 046.872 610 m.
http://www.convertunits.com/from/acre/to/square+feet
A half acre equals to 21,780 square feet. About 43,560 square feet make one acre. To convert acres into square feet, the number of acres is multiplied by the conversion factor. In this case, 0.5 acres is multiplied by 43,560 square feet.
https://www.reference.com/science/many-square-feet-half-acre-ee4c30b14b1e5854
How to convert square feet to acres. Alternatively, you may want to know how many acres there are in x square feet. To convert from square feet to acres multiply your x figure by 2.2956841138659E-5.
http://www.thecalculatorsite.com/conversions/area/square-feet-to-acres.php
The answer is 2.29568411387E-5. We assume you are converting between acre and square foot. The SI derived unit for area is the square meter. 1 square meter is equal to 0.000247105381467 acre, or 10.7639104167 square feet. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between acres and square feet. Type in your own numbers in the form to convert the units!
http://www.convertunits.com/from/acre/to/square+feet
Confidence votes 16.3K. 0.5 acres is 21780 square feet. There are 21780 square feet in a half acre. 0.5 acres is 21780 square feet. There are 21780 square feet in a half acre.
http://www.answers.com/Q/How_many_square_feet_are_in_half_an_acre
How many square feet are in an acre? There are 43,560 square feet in an acre. This is equal to 1/640 of a square mile, or approximately 80 percent of the area of an American football field, including the end zones.
https://www.reference.com/science/many-square-feet-half-acre-ee4c30b14b1e5854
There are 43,560 square feet in one acre.   An acre is a unit of area. 640 acres equal a square mile. Hence, it is 1/640 of a square mile. Since a square mile contains 2…7,878,400 square feet, an acre is 27,878,400 divided by 640, which is 43,560 square feet. Remember: an acre can be converted to SQUARE feet, not plain (linear) feet. Square feet and feet are not the same units.
http://www.answers.com/Q/How_many_square_feet_is_one_half_acre
Here are a few examples: Square: 208.…71 feet on a side (approx.) Rectangles: 9' x 4840' 10' x 4356' 12' x 3630' 20' x 2178' 24' x 1815' 40' x 1089' 60' x 726' 72' x 605' 120' x 363' 121' x 360' 180' x 242' Circle: 235.5-ft diameter (approx.) All 13 of these examples have areas of 1 acre. One Acre = 43560 sq ft.
http://www.answers.com/Q/How_many_square_feet_is_one_half_acre
The acre is a unit of land commonly employed within North America and the Caribbean. It is equal to 4,047 square metres or 43,560 square feet. This measurement is roughly equivalent to 40 per cent of a hectare. Interestingly enough, the acre can trace its roots back to mediaeval times. It was defined as the area that could be ploughed in a single day with the help of an ox.
http://www.thecalculatorsite.com/conversions/area/square-feet-to-acres.php
how many square feet is in a half an acre
Half acre equals to 21,780 square feet.