Square feet calculation is straight forward if the sites have fixed length and width .See the example below and we use

squre-feet-calcuation.JPG
In the above case we multiply length and width to compute the total square feet. So it will be 50*40=2000 square feet. Now if we have uneven numbers in all four side, How can we get the total square feet. We call this as Quadrilateral.
Quadrilateral-square-feet.JPG

Just enter the below values  to calculate the total square feet of uneven sides

A-B -

A-D -

B-C -

C-D -

B-D - (Diagonal)



Total Square Feet is