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Top 5 most abundant elements in the human body (by mass)

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The 5 most abundant elements in the human body (by mass) by mass fraction of the body: Oxygen, Carbon, Hydrogen, Nitrogen, Calcium.

Snapshot · 2026-09-23

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  1. 1

    Oxygen

    ~65%

  2. 2

    Carbon

    ~18%

  3. 3

    Hydrogen

    ~10%

  4. 4

    Nitrogen

    ~3%

  5. 5

    Calcium

    ~1.5%