The math behind SketchAndCalc is called the shoelace formula or shoelace algorithm. It also goes by the name of Gauss’s area formula and the surveyor’s formula.
SketchAndCalc is currently being trusted every day in fields from neuroscience and nano-computing to landscape gardening and farming. If you have reason to believe that SketchAndCalc’s calculation of area is inaccurate, please verify that your imported image is true and that it’s X Y ratio is 1:1 as this is a common mistake.