Radius Calculator

How does the radius calculator work?

The radius calculator is used to find the radius of a circle, either using its circumference or its area. After the known values and calculation type are inputted into the calculator, click on "calculate".

Why use the radius calculator

Radius, one of the most significant measurements in human history, the radius calculator is undoubtedly useful for solving a multitude of problems! Engineers require radius to create new designs for camera lenses, using the radius of curvature to find new focal lengths of the lens! We use radius to our benefit almost daily, the odometers in our cars are used to indicate the total distance traveled use radius to calculate how far the car has traveled! Throughout all of human history radius has been everywhere in all sorts of things, what will you use the radius calculator for?

A brief history of the odometer

In the 17th century, an English inventor and engineer named Thomas Savery invented a tool for determining distance for ships in the interest of finding the best routes to most effectively deliver mail! Later in 1775, Benjamin Franklin developed a simple odometer to aid in measuring the distance he traveled by carriage. Today we see the odometer mentioned mostly for its use in cars much like Benjamin Franklin used them for, however odometers are also used to calculate the perimeter of properties!

Input fields explained

Before using the radius calculator, it may help to understand the input fields.

• Don't have circumference? Use the circumference calculator! (link)

• Circumference(C):

  Enter the circumference of the circle.

• Area(A):

  Enter the area of the circle.

• Calculation type:

  Choose between the two types of calculations to perform, finding the radius from circumference (C) or from area (A).

Understanding the results

Once all the inputs have been entered into the radius calculator, the radius will be provided as an answer, the result will be based on the selected calculation type (circumference or area).

Below is a helpful example and demonstration of how the radius calculator functions.

To find the radius (r) using circumference (c):

r = c / (2 × π)
r = 24 / 2 x 3.14
r = 24 / 6.28
r = 3.82