Circle Area Calculator

Enter radius and click calculate button to find the area using circle area calculator 

A = π r2


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Circle Area Calculator 

Use the area of a circle calculator to find the total space of a circle. This advanced area tool gives the steps of the circle area calculation as well. 

Moreover, it finds the diameter and the circumference of the circle.

What is the circle area?

Circle area is a simple thing. The stretch of a circle on a two-dimensional plane. It tells you the area occupied by the circle in the unit square. 

area of a circle

Circle area formula:

The formula used to find the area of a circle is given below;

Circle area = A = πr2

Here π is the mathematical constant pi. Its value is 3.14.

Note: r2 is not equal to the diameter of the circle i.e 2r. 

How to find the circle area?

The allmath’s calculator to find the circle area gives 100 percent accurate results. Other than that, there is a manual method.

  1. Find the radius.
  2. Calculate its square.
  3. Multiply the value with pi.
  4. The final value is the area of the circle.


A circle has a radius of 7cm. Find its area.


Step 1: Find the square of the radius.

r2 = r x r 
   = 7 x 7
   = 49 cm2

Step 2: Put in the formula.

A = πr2
A = π(49)

Step 3: Solve.

A = (3.14)(49)
   = 153.9 cm2

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