Irregular Polygon Area Calculator


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Online calculator to calculate the area of a non-self-intersecting irregular polygon with n vertices given by their Cartesian coordinates. The figure below shows an example of an irregular polygon with 6 vertices.

irregular polygon

How to use the calculator

Enter the number of points n that form the irregular polygon and the coordinates x and y of the vertices and press "calculate area". The vertices coordinates must be input in order: either clockwise or anticlockwise. The output is the area of the irregular polygon. In case you have a polygon with more than 10 vertices, divide it into smaller polygons find the area of each polygon and add them to obtain the total area.

n =


x1 = , y1 =
x2 = , y2 =
x3 = , y3 =
x4 = , y4 =
x5 = , y5 =
x6 = , y6 =
x7 = , y7 =
x8 = , y8 =
x9 = , y9 =
x10 = , y10 =
area =
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Updated: 2 April 2013

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