Circumference Calculator

How does the circumference calculator work?

The circumference calculator is used to find the circumference of a circle. Circumference is calculated with the radius (R) or diameter (D) of a circle. Circumference is what perimeter is to any other shape, in other words, circumference is the measurement of length for the outer boundary line of a circle.

Why use the circumference calculator

Circumference, one of the most historically significant measurements, the circumference calculator is unquestionably useful for solving a myriad of problems! Engineers require circumference to create new designs of circular objects, things even as mundane as pizza cutters, rolling pins to more complex components, bearings, gears, and more! Circumference is also indispensable when calculating the distance of travel or how many rotations a circular object will make given a certain distance! Throughout all of human history circumference has been used for all sorts of things, what will you use the circumference calculator for?

A Brief History of the Wheel

The earliest wheels were seen around the 4th millennium BC in southern Mesopotamia known today as Iraq, where the Sumerian society had created long rotating axles, which were inserted into discs made of wood. It wasn't until circa. 2000BC the wooden wheels started to be hollowed out to make them lighter! In the present, wheels are drastically different, mostly made of strong metallic alloys and enveloped with rubber!

Input fields explained

Before using the circumference calculator, it may help to understand each input field.

• Radius(R):

  Enter the radius of the circle.

• Diameter(D):

  Enter the diameter of the circle.

• Calculation type:

  Select the type of calculation you would like to use, circumference from radius (R) or diameter (D).

Understanding the results

Below is a helpful example of the mathematical formulas used for this calculator.

Circumference formula

Circumference is calculated with the following formula:

Using the radius(R) of a circle:

Circumference C=2πR

or

Using the diameter(D) of a circle:

Circumference C=πD