Editorial & Advertiser disclosure

Global Banking and Finance Review is an online platform offering news, analysis, and opinion on the latest trends, developments, and innovations in the banking and finance industry worldwide. The platform covers a diverse range of topics, including banking, insurance, investment, wealth management, fintech, and regulatory issues. The website publishes news, press releases, opinion and advertorials on various financial organizations, products and services which are commissioned from various Companies, Organizations, PR agencies, Bloggers etc. These commissioned articles are commercial in nature. This is not to be considered as financial advice and should be considered only for information purposes. It does not reflect the views or opinion of our website and is not to be considered an endorsement or a recommendation. We cannot guarantee the accuracy or applicability of any information provided with respect to your individual or personal circumstances. Please seek Professional advice from a qualified professional before making any financial decisions. We link to various third-party websites, affiliate sales networks, and to our advertising partners websites. When you view or click on certain links available on our articles, our partners may compensate us for displaying the content to you or make a purchase or fill a form. This will not incur any additional charges to you. To make things simpler for you to identity or distinguish advertised or sponsored articles or links, you may consider all articles or links hosted on our site as a commercial article placement. We will not be responsible for any loss you may suffer as a result of any omission or inaccuracy on the website.

Home > Top Stories > How To Find The Area Of A Circle?

How To Find The Area Of A Circle?

Published by Gbaf News

Posted on January 15, 2017

3 min read

Last updated: January 21, 2026

Illustration showing the formula for calculating the area of a circle - Global Banking & Finance Review — This image visually represents the formula A = πr² for calculating the area of a circle, illustrating the relationship between radius and area. It supports the article's discussion on finding the area of circles in real-life situations.

A circle is the most recognizable shape in geometry and finding its area is tricky. Learning how to find the area of a circle is essential as it helps to determine real-life situations like the size of round rug needed or to calculate the space required to construct a garden which is round in shape. The circles are ellipses that have a radius which is constant around its center, and they have properties like diameter, radius, area, and circumference.

Area of a Circle:
The formula used to determine the area of a circle is A = πr².
A π is a non-algebraic number which is the ratio of the circumference to its diameter and is estimated at 3.14. To find the area of a circle, you should multiply the radius by radius and then multiply by 3.14.

To find the Radius of a Circle: A radius is measured from the center to the edge of a circle. The length of the radius will remain the same irrespective of it being measured in any direction. The diameter is twice the radius, and it is a line that passes through the center and divides the circle into two halves and connects the opposite sides of the circle. Generally, to calculate the area of a circle, the radius will be provided. For example, if the radius if a circle is 4 cm, using the above formula
A = π_r_².
Where r is the radius, in the above example, r = 4 and if that is squared then r squared = 4 square = 16.
Multiply by π which is approximated to 3.14. The area of the circle of a radius of 4 cm is
A = 3.14* 16 = 50.24

Calculating using the Diameter: Sometimes, instead of providing radius you will be given the diameter of a circle. If the diameter is provided as 8 cm, then the radius can be determined as the diameter is twice the radius. If the value of the diameter is given, then the radius is ½ of diameter. In the example, then radius = d/2 = 8/2 = 4.
After converting the diameter into the radius, you can now use the previous formula of A = π_r_². Use the value of the radius determined using the diameter to calculate the area of the circle.

Calculating using the Circumference: If the circumference of a circle is provided, then you can find the area even if the radius is not available.
A = π [C / (2 π)]².
The circumference is pi multiplied by the diameter. If c is the circumference and d is the diameter then c = πd. The diameter is twice the radius, combine all these qualities to create the following equation.
C = 2πr
r = c/2π
The area of the circle is A = πr(square)
A = square(π(c/2π))
A = square(c)/4π

Circles have various properties like circumference, diameter, radius, and area but finding the radius of the circle helps calculate all the other parameters. Some real-life applications where the area of a circle can be used are the size of the cake and pizza are determined by the diameter of the pan they are baked in and the measurement of the football field and the stadium. Knowing the radius of the circle all the other characteristics can be calculated based on the parameters of the circle many real-life applications are built.