Surface area of a sphere calculator

Instructions for using the 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

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!

Enter r, which is the radius of the sphere:

The surface area of the sphere is :

 Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems.

Need a math tutor?
Get an answer in 10 minutes or less from a math expert!

Justanswer features top-notch math experts handpicked by personnel after they have taken and passed a rigourous math test and after their credentials have been verified by a third party

Ask a Math Tutor or Teacher Now

Recent Articles

1. Average age word problem

Aug 09, 16 01:40 PM

Average age of Dipu and Apu is 22 years. Average age of Dipu and Tipu is 24 years. Age of Dipu is 21 years. What are the ages of Apu, and tipu ? Let