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Area of a Circle Calculator
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The total space inside the boundary of the circle is known as the area of the circle. Area is measured in terms of square units.

Area of a circle

Area of a Circle Calculator takes the radius of a circle and calculates the area of the circle.

Surface Area of a Circle is same as Area of a Circle since it is two dimensional figure.

 

Step by Step Calculation

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Step 1 :  

Apply Formula for calculating the area of a circle  = π * r2.


Here, r = radius of circle.


Value of π = 3.142 or 22/7



Step 2 :  

Put the values in the formula and find the area of a circle.



Step 3 :  

Then we will get the desired result.



Area of a Circle Problems

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  1. Find the area of circle with radius 7 cm.


    Step 1 :  

    Given:


    r = 7 cm.


    π = 3.142 (fixed value).



    Step 2 :  

    Formula:


    Area of Circle = π * r2.


    Put the values in the formula and find the area of a circle.


    Area of Circle = 3.142 * (7 cm)2.



    Step 3 :  

    So, multiply all these values


    Area of Circle = 3.142 * 49 cm2.



    Answer  :  

    Area of Circle = 153.93 cm2.



  2. Find the area of circle with radius 5 cm.


    Step 1 :  

    Given:


    r = 5 cm.


    π = 3.142 (fixed value).



    Step 2 :  

    Formula:


    Area of Circle = π * r2.


    Put the values in the formula and find the area of a circle.


    Area of Circle = 3.142 * (5 cm)2.



    Step 3 :  

    So, multiply all these values


    Area of Circle = 3.142 * 25 cm2.



    Answer  :  

    Area of Circle = 78.54 cm2.



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