Area of a Circle Calculator

Area of a circle - is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, A = πr2, where r is the radius of the circle.

Area of a Circle Calculator

Enter the Radius



Here are some samples of Area of a Circle calculations


Area of a Circle Calculator: If you need some help with geometry exercises this is the right page for you. Area of Circle Calculator is an online tool specifically created to find the Area of a Circle. Make your Calculations faster with our calculator and get the output in a fraction of seconds. Read on further to know What is meant by Area of Circle, how to find Area of Circle, etc.

What is meant by the Area of Circle?

The area of Circle is usually defined as the number of square units that cover inside the circle. The region occupied by the Circle in two-dimensional space is referred to as Area of the Circle. The area is represented by a square unit. A circle is usually a closed figure from which all the points lying on the surface of a circle are equidistant and the point is called the center.

Distance between the center and surface of the circle is known as the radius.

Formula to calculate the area of the circle is πr2 where r is the radius.

How to use Area of a Circle Calculator?

You can follow the simple procedure on how to use our calculator. Go through the instructions and get the area of Circle easily.

  • Enter the radius in the respective field input.
  • Right after the input button, you will have a provision to choose from the units like cm,m, ft, yd, mi, etc. Select the one as per your need and then click on the Area Button.
  • Thereafter, our Area of Circle Calculator provides you the output.

How to find the Area of Circle?

Step 1: Determine the radius of the circle

Step 2:Substitute the value of radius in the Formula Area = π*r*r

Step 3:Finally you can find the area of Circle by following the above procedure.

In certain cases, where the diameter "d" is given you can calculate the radius by dividing the diameter by 2

i.e. r=d/2

Example 1: Calculate the Area of Circle if the radius is 15 cm?

Solution: Given the radius of the Circle = 15 cm

We know the Area of Circle as per formula = π*r*r

Here in this case radius r = 15 cm

On Substituting in the formula we get A = π*15*15

Usually the value of π(Pi) = 3.14

thus we get A = 3.14*15*15

= 706.5 Sq. Cm

∴ Area of Circle for radius 15 Cm is 706.5 cm2.

FAQs on Area of a Circle

1. How do you calculate the Area of Circle?

The area of Circle is calculated using the formula πr2. Substitute the radius and you will get the Area of Circle easily.

2. What is the formula for the Area of Circle?

The area of Circle formula is πr2. You can calculate the area using this easily.

3. What does Area of Circle mean?

The area of Circle is usually defined as the number of square units that cover inside the circle.

4. How to find the area of a circle if the diameter is given?

You can calculate the area of a circle if the diameter is given as such

D=2r

thus r= D/2, substitute the same in the Area of Circle formula i.e. πr2

= π*(D/2)2

= πD2/4


Area of a Circle Calculator