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Circle Area Calculator

This calculator requires the use of Javascript enabled and capable browsers. It is to determine the area of a circle. Answer the questions about the radius. All entries should be numeric. The answer is returned as a number, based on your entries. In the listed formulae for this set of calculations, PI here is used as 3.1415929203539825. Enjoy!.

A few other area calculators for your use are our Ellipse Area Calculator, Parabola Area Calculator, Parallelogram Area Calculator, Pyramid Area Calculator, Trapezoid Area Calculator, our Surface Area Calculator, Irregular Polygon Area Calculator and our Land Parcel Area Calculator. At least you are in the right area...


Formula - A = PI x (r x r)
Enter the radius of the circle
square units

Updated: 7/2/11

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