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.

Sphere with pyramid

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.

Geometry ebook

Recent Articles

  1. Types of Triangles

    Dec 03, 22 12:47 PM

    Learn to identify 6 types of triangles based on their sides or angles and 7 more types based on both their sides and angles.

    Read More

  2. Box and Whiskers Plot

    Nov 18, 22 08:20 AM

    Easily learn to construct a box and whiskers plot for a set of data by using the median and the extreme values.

    Read More

Tough algebra word problems

100 Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius!

Math quizzes

 Recommended

Math vocabulary quizzes