Annulus Calculator

Enter Annulus Info

<-- Lg Radius
<-- Sm Radius

How does the Annulus Calculator work?

Free Annulus Calculator - Calculates the area of an annulus and the equation of the annulus using the radius of the large and small concentric circles.
This calculator has 2 inputs.

What 1 formula is used for the Annulus Calculator?

A = π(R2 - r2)

For more math formulas, check out our Formula Dossier

What 3 concepts are covered in the Annulus Calculator?

A ring shaped object, bounded by two concentric circles
the set of all points in the plane that are a fixed distance from a fixed point
Distance from the center of a circle to the edge

Example calculations for the Annulus Calculator

  1. An annulus has an outer radius of 12 and an inner radius of 5

Annulus Calculator Video