Annulus (Ring) Area Calculator
Calculate the area of an annulus or ring using this tool. It is designed for students, educators, and professionals who need quick, accurate results without complex manual calculations.
Results
The area of the annulus is: 0 square units.
Data Source and Methodology
All calculations are based on standard mathematical formulas for calculating the area of an annulus. Consult authoritative geometry resources for more details.
The Formula Explained
Glossary of Terms
- Outer Radius (R): The distance from the center of the ring to the outer edge.
- Inner Radius (r): The distance from the center of the ring to the inner edge.
- Area (A): The space enclosed between the outer and inner circles.
How It Works: A Step-by-Step Example
To calculate the area of an annulus, enter the outer and inner radii. For example, if R = 5 units and r = 3 units, then the area is calculated as:
Frequently Asked Questions (FAQ)
What is an annulus?
An annulus is a ring-shaped object, a region bounded by two concentric circles with different radii.
How do I use the annulus area calculator?
Simply enter the outer and inner radii and click 'Calculate Area' to get the result.
Can the inner radius be larger than the outer radius?
No, the inner radius must be smaller than the outer radius for a valid annulus.
Is this tool free to use?
Yes, our annulus area calculator is free for everyone.
What units can I use for the radii?
You can use any consistent units for the radii, as long as they are the same for both inputs.