Here Origin of the circle O Diameter D and Radius r. The circumference of an object is the total length of the line that forms the object. C circumference R radius of circle.
Calculate the circumference of a circle using our Circumference Calculator or try calculating it yourself with the formulas provided.
Pi is a mathematical constant and it is also the ratio of the circumference of a circle to the diameter. C p d o r C 2 p r. So you can use whichever formula is more convenient. The size is scaled by the golden ratio of 1618 or 13133 ft in radius.