Metric Unit Calculator
The diagram updates with your entries and is illustrative, not necessarily drawn to scale.
The formula, your substituted values, and the evaluated result are shown below.
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View offerAffiliate link — we may earn a commission at no extra cost to you.Calculate the area between two concentric circles from their outer and inner radii.
π × (outerRadius × outerRadius-innerRadius × innerRadius)
The outer radius must be greater than or equal to the non-negative inner radius. The result uses square units. Decimal answers are rounded for display; retain additional precision for subsequent calculations.
This calculator belongs to the Plane Geometry section of the Math calculator library.
Calculate the area between two concentric circles from their outer and inner radii.