1 acre is 43,560 square feet. 21 acres x 43,560 square feet is 914,760. 21 acres perfectly square would be 956.43 feet on each side. 21 acres 1,000 feet wide would be 914.76 feet long. remember the...
This all depends on the location. Land sells for more in some areas versus another, so it's best to have a more defined location of where an acre of land will sell for to get a more direct answer.
Measure two adjacent sides of your piece of land if it's square, rectangular, or a parallelogram in shape. Multiply those two numbers (in feet). If the number you get is less than 87,120, then you...