# Surface area of a sphere calculator

This surface area of a sphere calculator below is very simple to use. Just enter the radius of the sphere. Then click on the button that says calculate.

Enter r, which is the radius of the sphere:

The surface area of the sphere is :

Instructions for using the calculator

If you know the diameter, but not the radius, just divide the diameter by 2 to get the radius

Do not enter numbers with a slash (/)! If you do, the wrong answer will be computed

Therefore, convert all fractions into decimals before entering numbers

Enjoy the calculator!

 Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems so you can master geometry.

## Recent Articles

1. ### How To Find The Factors Of 20: A Simple Way

Sep 17, 23 09:46 AM

There are many ways to find the factors of 20. A simple way is to...

2. ### The SAT Math Test: How To Be Prepared To Face It And Survive

Jun 09, 23 12:04 PM

The SAT Math section is known for being difficult. But it doesn’t have to be. Learn how to be prepared and complete the section with confidence here.