Circle Dimension Calculator

Welcome to our circle dimension calculator! This page can be used as a circle area calculator, a circumference of a circle calculator, and a circle diameter calculator! We will use the radius of a circle, "r", to find these parameters. 
This page also can work the other way around as a circle radius calculator, if the area or circumference of the circle is provided. 
The following calculations are a great way to get a better understanding of circles and their properties. Let's begin!
CalculationInputs﻿﻿Radius
:10m​
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Output﻿﻿Diameter
:20m​
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﻿﻿Area
:314.2m2​
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﻿﻿Circumference
:62.83m​
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Radius calculation given area
Radius calculation given circumference
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ExplanationDiameter refers to a straight line that reaches from one point on the edge of a round shape or object, through its centre, to a point on the opposite edge.
Similar to the term 'perimeter' of polygons, circumference is the linear distance of a circle's edge. However, the term perimeter is not used for circles. 

The diameter of a circle is calculated by doubling the radius:
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Diameter=2rDiameter = 2rDiameter=2r
The circumference of a circle is calculated using the formula:
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Circumference=2πrCircumference = 2\pi rCircumference=2πr
The area of a circle is calculated using the formula:
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Area=πr2Area = \pi r^2Area=πr2
Where:
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r=Radiusr=Radiusr=Radius
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