Annulus Area Calculator
Calculate annulus area A = π(R² - r²) for ring shapes instantly.
Must be less than outer radius
r
RAnnulus (Ring)
⭕ Results will appear here
Enter outer and inner radii, then click "Calculate"
Annulus Area Calculator
Calculate the area of an annulus (ring shape) formed by two concentric circles. The annulus area is the difference between the outer circle area and inner circle area.
Perfect for engineering, architecture, and geometry problems involving ring-shaped objects.