Circumference calculator


The following circumference calculator is easy to use. Just enter the value of the radius and hit calculate button.



Recall that the formula to get the circumference of a circle  

is 2 ×pi×r with r = 3.141592653589793

Therefore, the circumference depends only on the size of r. That is why you only need to enter r here to get the circumference

The calculator will only accept positive value for r since a distance cannot be negative

As a reminder, if r = 4 cm for instance,

circumference = 2 ×3.14 ×4 = 25.12 cm


Enter the radius of the circle:     

       

The result is :  



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






Recent Articles

  1. Printable first grade math test

    Mar 24, 17 09:43 AM

    A printable first grade math test that can readily be printed and taken to find out how well you or your kids know very basic concepts of math.

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

            Follow me on Pinterest


Page copy protected against web site content infringement by Copyscape






Recent Lessons

  1. Printable first grade math test

    Mar 24, 17 09:43 AM

    A printable first grade math test that can readily be printed and taken to find out how well you or your kids know very basic concepts of math.

    Read More