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!

Radius

:10m

Diameter

:20m

Area

:314.2m2

Circumference

:62.83m💬 We'd love your feedback on this template! It takes 1min

Diameter 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:

The circumference of a circle is calculated using the formula:

The area of a circle is calculated using the formula:

Where:

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