# Area Calculator

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The Area Calculator helps you compute area      Circles  based on some simple measurements and the shape of the area.

INSTRUCTIONS::  To compute the square footage of the area, you must first identify the shape of the area (see diagrams).  The common choices are:

• Circular - Hopefully we all know what a circle looks like.
• Elliptical - This is a flattened circle or oval .
• Three Side - This is a triangle
• Four Sides -  This is a quadrilateral and includes the simple rectangle, trapezoid and a parallelogram.
• Many Sides - This is a polygon.  The formulas work for any number of equal sided shapes with equal angles.

Pick your shape (see the diagrams), and then enter the measurements when you click on the calculator buttons (top right) or on the links in the following list.  The calculator will provide the square footage.

• Circular Areas
• CLICK HERE to compute the area of a sector or wedge of a circle.
• CLICK HERE to compute the area of an arc section of a circle.
• CLICK HERE to compute the area of an ellipse.  4 Sided Areas    Polygons    Triangle and Ellipse
• Three Sided (Triangles)
• CLICK HERE to compute the area of a triangle If you know the base (b) and height (h)
• CLICK HERE to compute the area of a triangle If you know the length of three sides (a, b, c).
• Four Sided Areas