Calculating the Circumference of a Circle

The circumference of a circle is the distance around the outside of the circle. It could be called the perimeter of the circle.

How to find the circumference of a circle:

  • The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.
  • If a circle has a diameter of 4, its circumference is 3.14*4=12.56
  • If you know the radius, the diameter is twice as large.


What is the Circumference of a circle with the given dimensions?

Round the answer to the nearest hundredth. Use 3.14 for pi.

Circumference = cm