# Area of a Circular Ring - Geometry Calculator

| Online calculator to calculate the enclosed area (in blue) of a circular ring when outer and inner radii are known.
## How to use the calculatorEnter the outer and inner radii R1 and R2 (with R1 > R2) as positive real numbers and press "enter". The output is the area of the circular ring.
## More References and linksOnline Geometry Calculators and Solvers. |