An Annulus is a shape made out of two circles.The region covered by two coincentric circles forms the Annulus Shape.
It share same center. Some of the real-life examples are finger-ring, dough-nut, etc. This Annulus Calculator will help
you to find 5 unknown variables by providing 2 known variables.
Select which value you are Providing (Outer Radius (r1), Inner Radius (r2), Outer Circumference (C1),
Inner Circumference (C2), Outer Circle Area (A1), Inner Circle Area (A2), Annulus Area (Ao)) input value and Click on Calculate .
r1=Outer Radius
r2=Inner Radius
C1=Outer Circumference
C2=Inner Circumference
A1=Area of circle of r1
A2=Area of circle of r2
Ao=Shaded Area
Calculator
Calculations Options
How to use Annulus Calculator?
Step by step procedure for Annulus Calculator is as follows.
Step 1: Select which value you will be providing? Dropdown has Outer Radius(r1) and Inner Radius(r2), Outer Radius(r1) and Inner Circumference(C2), Outer Radius(r1)and Inner Circle Area(A2), Inner Radius(r2) and Outer Circumference(C1), Outer Circumference(C1) and Inner Circumference(C2), Outer Circumference(C1) and Inner Circle Area(A2), Inner Radius(r2) and Outer Circle Area(A1), Inner Circumference(C2) and Outer Circle Area(A1), Outer Circle Area(A1) and Inner Circle Area(A2), Annulus Area(Ao) and Outer Radius(r1), Annulus Area(Ao) and Inner Radius(r2), Annulus Area(Ao) and Outer Circle Area(A1), Annulus Area(Ao) and Inner Radius(A2), Annulus Area(Ao) and Outer Circumference(C1), Annulus Area(Ao) and Inner Circumference(C2) options.
Step 2: Input appropriate value as per selected type in Step 1.
Step 3: Now click on "Calculate" button to get result.
You will get Outer Radius(r1), Inner Radius(r2), Outer Circumference(A1), Inner Circumference(A2), Outer Circle Area(A1), Inner Circle Area(A2), Annulus Area(Ao) as per you selection and value input.