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    Area & Drawings

    Annulus Ring Area Calculator

    Annulus Ring Area Calculator performs a browser-local calculation using measurements and quantities you control. The results are presented as labelled figures so each number is easy to interpret. Assumes concentric circles; inner radius must be smaller than outer radius.

    MAKE IT SIMPLE
    Formula assumptions and scope

    Assumes concentric circles; inner radius must be smaller than outer radius.

    Result

    Worked examples

    Outer radius (m): 5, Inner radius (m): 3

    Ring area: 50.265482 m²

    Using these sample input values gives the first labelled output above. Assumes concentric circles; inner radius must be smaller than outer radius.

    Questions & answers

    Can I use the default numbers for purchasing or safety certification?

    No. Replace the examples with your real values. Assumes concentric circles; inner radius must be smaller than outer radius.

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