Welcome to the Lot Area Calculator, aka the Irregular Polygon Area Calculator.
The original purpose was to calculate real state lot sizes when only the outside distances are provided, e.g. 110x80x130x80
The correct area of an irregular polygon can not be calculated from only the lengths of the segments. Additional angle information is required to further specify the polygon in order to calculate its area. For example, the 110x80x130x80 polygon can range in area from (approximately) 1,905 to 9,564 [unit independent – go ahead, try it in the applet].
Version 1.2. Last update: 2010/July/23