Area of a Circular Ring (Annulus) Calculator

Posted by Dinesh on

Online geometry calculator to calculate the area of the circular ring (annulus) using inner and outer radius values.

Calculate Area of Circular Ring using Inner, Outer Radius

Formula:

Annulus = ? (R - r) (R + r)

where,
R = outer radius,
r = inner radius,
? = 3.142857142857143