Area of Polygon by Drawing
Can you draw your polygon? Maybe you know the coordinates, or lengths and angles, either way this can give you a good estimate of the Area.
Use the "Edit" button below to manually edit the coordinates, or to enter new coordinates of your own.
images/area-coords.js?mode=area
Note: due to computer rounding errors the last digit isn't always correct.
What's Regular, Concave, Complex?
When all angles are equal and all sides are equal it is regular, otherwise it is irregular
When any internal angle is greater than 180° (it points inwards) it is concave. (Think: concave has a "cave" in it), otherwise it is convex.
When the boundary crosses over (so the polygon intersects itself) it is complex, otherwise it is simple like most polygons we deal with.
Most area formulas (and our drawing tool) are designed for simple polygons. If a polygon is complex the calculated area isn't reliable as the overlapping parts can cancel each other out.