Q:
# How Do You Convert Circumference to Diameter?

**To calculate a circle's diameter from its circumference, one should divide the circumference by the constant pi, which is an irrational number approximately equal to 3.14159265358979.**

Credit:
Space Images
Blend Images
Getty Images

Circumference is defined as the distance around a circle; the diameter is the straight-line distance across the circle that touches two points on its border and goes through its center. The ratio of a circle's circumference to its diameter is the constant pi. In other words, circumference/diameter = pi, or circumference = pi * diameter. Therefore, the length of the diameter of a circle is equivalent to its circumference divided by pi.

Similarly, the length of a circle's radius, (the distance from the circle's center to any point on its border), is equivalent to its circumference divided by (2*pi). The radius is half as long as the diameter.

Learn more about Shapes-
Q:
## How Do You Measure the Circumference of a Circle?

A: To measure the circumference of a circle, first measure the diameter and multiply that number by the mathematical constant pi. The diameter is a straight l... Full Answer >Filed Under: -
Q:
## What Is the Formula for Radius?

A: The formula for a radius is the diameter of a circle divided by two. The radius of a circle is defined as the distance from the middle of a circle to any p... Full Answer >Filed Under: -
Q:
## How Do You Find the Arc of a Circle?

A: To find the arc of a circle, divide the angle subtended at the center of the arc by 360 degrees, then multiply the answer by the circumference of the circl... Full Answer >Filed Under: -
Q:
## How Do You Find the Circumference of a Circle?

A: Find the circumference of a circle using the formula 2 x π x r. You need the value of π, or pi, and the radius of the circle. Full Answer >Filed Under: