Enter the circle diameter into the Circle Length Calculator. The calculator will evaluate the Circle Length. 

Circle Length Formula

The following two example problems outline the steps and information needed to calculate the Circle Length.

CL = CD * pi
  • Where CL is the Circle Length ( )
  • CD is the circle diameter 

To calculate the circle length, multiply the circle diameter by pi.

How to Calculate Circle Length?

The following example problems outline how to calculate Circle Length.

Example Problem #1:

  1. First, determine the circle diameter.
    • The circle diameter is given as: 5.
  2. Finally, calculate the Circle Length using the equation above: 

CL = CD * pi

The values provided above are inserted into the equation below and computed.

CL = 5 * pi = 15.707

Example Problem #2: 

For this problem, the variables required are provided below:

circle diameter = 6

Test your knowledge using the equation and check your answer with the calculator..

CL = CD * pi = ?